Welcome to the North American Subaru Impreza Owners Club Thursday August 25, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Classifieds > Vendor 'Group Buy' Classifieds

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 08-24-2015, 12:28 PM   #1
GrimmSpeed
NASIOC Vendor
Vendor Sales Rating: (212)
 
Member#: 136396
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: Minneapolis, MN
Vehicle:
2015 WRX, 2012 WRX,
2013 BRZ, 2006 STI

Default 2015-2016 WRX GrimmSpeed StealthBox Cold Air Intake - GROUP BUY

The 2015+ Subaru WRX GrimmSpeed Cold Air Intake


Introduction

Inspiration for the StealthBox Intake came from internal discussions about what we wanted from an intake system for the 2015+ WRX. Of course performance is the highest priority, but at GrimmSpeed so much more than that goes into a product. We wanted an intake that purred quietly under normal driving circumstances, but would roar at wide open throttle. We wanted an intake that looked at home in the well-sported 2015+ WRX engine bay instead of a shoebox stuffed into the fender area. From here, the SteathBox was born. We took the concept one step further and referenced the F-117 Nighthawk as inspiration for the stealthy look of the GrimmSpeed heat shield. It should come as no surprise that the performance it packs is equally unique.

Quick Specs
  • +32wtq (14.3%) and +21whp (9.6%)
  • Designed in CAD - Perfect mating with the factory turbo and ram-air scoop
  • Low bend angle aluminum tube - Minimize restriction and maximize performance
  • Shielded MAF sensor placement - Protects MAF from heat, which increases accuracy of readings
  • Made in the USA - Manufactured right here in Minnesota
Design

MAF diameter and placement, total bend angle, filter location, and heat shield design were the primary variables during the design phase. To ensure accurate readings, unaffected by the intense heat of the engine bay, MAF sensor placement absolutely must be within the heat shield. To minimize restriction, it was important to keep the total bend angle in the intake tube as low as possible, but still raise the filter location away from the ground to protect it from the elements. Lastly, testing showed the importance of utilizing the factory ram air scoop to feed the otherwise stagnant air in front of the fender.



Our engineers created a 3D model of the intake system and fender area in order to optimize each of these variables. The result is an intake with a total bend angle of 74 degrees, and a filter that is placed neatly within the fender, such that it offers protection from the elements without being unnecessarily exposed to the heat of the engine bay. Lastly, the shape of the heat shield follows that of the factory air scoop, feeds the filter with fresh air evenly and promotes swirl which prevents pockets of motionless air on the cold side of the shield.

We have made the decision not to sell the intake without the heat shield. It seems that others have done this to hit a lower price point at the cost of performance. We'd prefer that everybody using a GrimmSpeed StealthBox Intake have the best possible experience and the use of the heat shield is critical to the function of the intake system.

Materials and Fabrication

Each intake begins with a CNC bent and laser cut 6061 Aluminum tube. Contrary to popular belief, particularly from those producing composite intakes, we found that the increased thermal mass of using thicker aluminum tubing (1/8” wall thickness) kept the intake from being vulnerable to rapid temperature change. This is called the ‘thermal flywheel effect’ and will keep the rapidly fluctuating temperatures inside your engine bay from affecting intake temps as drastically.

Custom MAF flanges are machined from the same 6061 alloy and are placed on the straight nearest the filter, where we observed the most consistent cross-sectional flow. Mounting brackets are laser cut from 3/16” thick aluminum plate and CNC bent for perfect and repeatable fitment. Finally, heat shields are laser cut, CNC bent and hand assembled before going to powdercoating for a durable wrinkle black finish.

Performance

Dyno testing and long-term road testing are where all of this theory meets reality. Knowing that the same application of these design techniques resulted in intakes that performed extremely well on both the BRZ/FR-S and the 08-14 WRX/STI, we were confident in our chosen configuration. Dyno testing and tuning verified the intakes ability to make power and 6mos of road testing through winter/spring in Minnesota confirmed real-world performance.

We chose to use the exact same pull that tested the performance of our J-Pipe/Downpipe as the baseline for our 2015 WRX. This proves that our baseline is not somehow artificially low. We then installed the intake and had the car retuned using the same boost levels and air fuel ratios (AFRs). This is an extremely important part of evaluating an intake system. If the before and after results aren’t showing the same boost levels or AFRs, performance increases can be attributed to tuning rather than to the performance of the intake hardware itself. The chart below shows the before and after just described with both boost and AFR plotted along with whp and wtq. It should be noted that the stock baseline for this car was 174whp, so this particular dyno reads very low.



The GrimmSpeed intake produced an additional 32ftlb (14.3%) at 3000rpm and 21whp (9.6%) at 5500rpm, with healthy gains all the way across both curves. As mentioned before, the AFR and Boost curves are also included to demonstrate that the gains shown are from the intake alone, not the manipulation of other variables.

As with any intake, tuning is required after installation to maximize gains and safety.

GrimmSpeed Stealthbox Intake Kit Includes
  • 1x CNC bent intake tube w/ MAF flange
  • 1x GrimmSpeed high-flow air filter
  • 1x Aluminum heat shield
  • 1x 12" MAF harness extension
  • 1x Silicon hump coupler
  • 3x Stainless steel worm gear clamp
  • 3x Rubber gasket material cut-to-length
  • 2x MAF sensor machine screws
Options

While only a very small portion of the intake is visible after installation (nearest the turbo), we still decided to offer a color choice for the intake tube. The heat shield will always be our stealthy black wrinkle, but the tube can be either a matching black, or a wrinkle red.

Fitments
  • 2015-2016 Subaru WRX








StealthBox heat shield in it's natural habitat, looking stealthy. Logo placement is subject to change.
* Registered users of the site do not see these ads.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
| AIM: GrimmSpd | Phone: 612-379-0000
Email:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by GrimmSpeed; 08-24-2015 at 02:11 PM.
GrimmSpeed is online now   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-24-2015, 12:28 PM   #2
GrimmSpeed
NASIOC Vendor
Vendor Sales Rating: (212)
 
Member#: 136396
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: Minneapolis, MN
Vehicle:
2015 WRX, 2012 WRX,
2013 BRZ, 2006 STI

Default

Group Buy Information
Closes on: September 4th, 2015
Payment deadline: September 11th, 2015
Pricing Structure: Flat rate, shipping calculated at checkout
2015+ WRX StealthBox Intake MSRP: $399.99

2015+ WRX StealthBox Intake Group Buy Price: $XXX.XX

We strongly recommend that the StealthBox intake be paired with a GrimmSpeed 3-port Boost Control Solenoid prior to tuning. You will have the option to add one to your order at a discounted rate, when you send payment.

To be added to the group buy, simply post up with your color preference. Orders will begin shipping after the group buy has closed.

The List:
1. sampleuser (Black) - Payment Received
2. JCarrion45 (Black) - Payment Received
3. Jawsofire (Black) - Payment Received
4. acquagio (Black) - Payment Received
5. On_Thy_Edge1 Black) - Payment Info Sent
6. LphalionWRX (Red) - Payment Received
7. Sleepr56 (Black) - Payment Received
8. Spider96 (Black) - Payment Received
9. Subienoob_L (Black) - Payment Received
10. Cisco272 (Black) - Payment Info Sent
11. Supple1 (Black) - Payment Received
12. italianhunnybee (Red) - Payment Received
13. 1sikRX (Black) - Payment Received
14. SuperPro_USA (Black) - Payment Received
15. SteadyHawkin (Black) - Payment Received
16. Foomanchu (Black) - Payment Received
17. oltrevf (Black) - Payment Received
18. njeezy29 (Black) - Payment Received
19. ProdigyAS (Black) - Payment Received
20. luckylindy2.0T (Red) - Payment Info Sent
21. shadow_772 (Black) - Payment Received
22. PROcede (Black) - Payment Info Sent
23. Wireeater (Black) - Payment Received
24. 1quikrex (Black) - Payment Received
25. TastyWombat (Red) - Payment Received
26. StylnCamaro - Payment Info Sent
27. Scovy24 (Red) - Payment Received
28. shadow_772 - Payment Info Sent
29. taylort4 - Payment Received
30. WeAreThe416 (Black) - Payment Received
31. disgrun7led (Black) - Payment Received
32. pincheturbo (Red) - Payment Received
33. stealth06wrx (Black) - Payment Received
34. ozma (Black) - Payment Info Sent
35. sti nova (Black) - Payment Received
36. miyagi (Red) - Payment Received
37. fattie92 - Payment Received
38. jrmaeswrx - Payment Received
39. rexster (Black) - Payment Received
40. blackjoint - Payment Received
41. ichabod11swp - Payment Received
42. jxmai105 - Payment Received
43. 15WRX_MD - Payment Received
44. documentarian - Payment Received
45. AWDSome15 - Payment Received
46. hekler - Payment Received
47. kylemcspecial - Payment Received
48. GGall - Payment Received
49. ne0tm616 - Payment Received
50. DutchOven - Payment Received
51. tyler37075 - Payment Received
52. RRTX (Red) - Payment Received
53. kmskater15 - Payment Info Sent
54. joe98200 - Payment Received
55. jyax - Payment Received
56. NJsub98 - Payment Received
57. ArmyOfSkittles - Payment Received
58. Surfrajbreh - Payment Received
59. Amoreuxi - Payment Received
60. maxxed - Payment Info Sent
61. subbiX - Payment Received
62. THauto99 - Payment Received
63. PRW_WRX15 - Payment Received
64. ne0tm616 - Payment Info Sent
65. polancd - Payment Received
66. dominiking310 - Payment Received
67. Jeff240sx - Payment Received
68. willtanged - Payment Received
69. skubie76 - Payment Received
70. wicked xt - Payment Received
71. Razhael - Payment Received
72. Nevr2fast - Payment Info Sent
73. killadawg - Payment Received
74. sirkls - Payment Received
75. RicksLR-WRX - Payment Received
76. LTpiedy - Payment Received
77. joker_man - Payment Received
78. HTOS - Payment Received
79. ForValhallaWeRide - Payment Received
80. Himynameisgreg - Payment Received
81. KimJongFail - Payment Received
82. DJ Brian BASS - Payment Received
83. WRXHec14 - Payment Received
84. HyRoad - Payment Info Sent
85. Cederroth94 - Payment Info Sent
86. johnbravo - Payment Received
87. lafa01 - Payment Received
88. Hm45 - Payment Received
89. Bunger - Payment Received
90. Slumber12 - Payment Received
91. famousjamos - Payment Received
92. LarenF3D5 - Payment Received
93. LarenF3D5 - Payment Received
94. josh3111 - Payment Received
95. Dnizzle - Payment Received
96. dbz - Payment Info Sent
97. mrsdoubtfire613 - Payment Received
98. dillonsimpson - Payment Received
99. Cisco Kidd - Payment Received
100. armani335 - Payment Info Sent
101. Marcimus_prime - Payment Received
102. MikeAlphaBaker - Payment Received
103. subydrivor - Payment Received
104. WRat - Payment Received
105. DetroitSaab - Payment Received
106. RCouchh - Payment Info Sent
107. gregonfire - Payment Received
108. D3luxe - Payment Received
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
| AIM: GrimmSpd | Phone: 612-379-0000
Email:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by GrimmSpeed; 09-11-2015 at 10:13 AM.
GrimmSpeed is online now   Reply With Quote
Old 08-24-2015, 12:38 PM   #3
Jawsofire
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 384316
Join Date: Mar 2014
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
Galaxy Blue Pearl

Default

I'll take a black please. Thanks.
Jawsofire is offline   Reply With Quote
Old 08-24-2015, 12:39 PM   #4
acquagio
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 425268
Join Date: Jul 2015
Default

Sign me up please for black!
acquagio is offline   Reply With Quote
Old 08-24-2015, 12:45 PM   #5
On_Thy_Edge1
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 183259
Join Date: Jun 2008
Chapter/Region: MWSOC
Location: South Saint Paul, MN
Vehicle:
2015 WRX
WRB

Default

Put me in on this, black

Last edited by On_Thy_Edge1; 08-24-2015 at 01:02 PM.
On_Thy_Edge1 is offline   Reply With Quote
Old 08-24-2015, 12:48 PM   #6
LphalionWRX
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 425290
Join Date: Jul 2015
Default

Put me in for red, local pickup please
LphalionWRX is online now   Reply With Quote
Old 08-24-2015, 12:48 PM   #7
Sleepr56
Scooby Specialist
Member Sales Rating: (8)
 
Member#: 67326
Join Date: Jul 2004
Chapter/Region: Tri-State
Location: CNY
Vehicle:
2015 WRX Limited
World Rally Blue Pearl

Default

Add me to the list, intake color = black, thanks!
Sleepr56 is offline   Reply With Quote
Old 08-24-2015, 12:49 PM   #8
Spider96
Scooby Specialist
Member Sales Rating: (34)
 
Member#: 156059
Join Date: Aug 2007
Chapter/Region: Tri-State
Location: Dutchess County, NY
Vehicle:
2015 WRX
Crystal White Pearl

Default

Black for me too, please!
Spider96 is offline   Reply With Quote
Old 08-24-2015, 12:52 PM   #9
Subienoob_L
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 393946
Join Date: Jun 2014
Default

Black please
Subienoob_L is offline   Reply With Quote
Old 08-24-2015, 12:59 PM   #10
Cisco272
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 427262
Join Date: Aug 2015
Default

Black for me, please add thanks
Cisco272 is offline   Reply With Quote
Old 08-24-2015, 01:05 PM   #11
Supple1
Scooby Newbie
Member Sales Rating: (1)
 
Member#: 316143
Join Date: Apr 2012
Default

Black for me please
Supple1 is offline   Reply With Quote
Old 08-24-2015, 01:12 PM   #12
GrimmSpeed
NASIOC Vendor
Vendor Sales Rating: (212)
 
Member#: 136396
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: Minneapolis, MN
Vehicle:
2015 WRX, 2012 WRX,
2013 BRZ, 2006 STI

Default

Quote:
Originally Posted by Jawsofire View Post
I'll take a black please. Thanks.
Done!
Quote:
Originally Posted by acquagio View Post
Sign me up please for black!
You got it!
Quote:
Originally Posted by On_Thy_Edge1 View Post
Put me in on this, black
On the list!
Quote:
Originally Posted by LphalionWRX View Post
Put me in for red, local pickup please
Awesome!
Quote:
Originally Posted by Sleepr56 View Post
Add me to the list, intake color = black, thanks!
Rock on!
Quote:
Originally Posted by Spider96 View Post
Black for me too, please!

Quote:
Originally Posted by Subienoob_L View Post
Black please
On the list!
Quote:
Originally Posted by Cisco272 View Post
Black for me, please add thanks
Thanks for the support!
Quote:
Originally Posted by Supple1 View Post
Black for me please


We're off to the races!

Matt Beenen
Engineering
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
| AIM: GrimmSpd | Phone: 612-379-0000
Email:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
|
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
GrimmSpeed is online now   Reply With Quote
Old 08-24-2015, 01:15 PM   #13
italianhunnybee
Scooby Newbie
Member Sales Rating: (3)
 
Member#: 180632
Join Date: May 2008
Chapter/Region: NWIC
Location: Bellevue, WA.
Vehicle:
2015 WRX limited
CWP

Default

One red for me please.
italianhunnybee is offline   Reply With Quote
Old 08-24-2015, 01:18 PM   #14
1sikRX
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 418222
Join Date: Apr 2015
Default

I would like one black please
1sikRX is offline   Reply With Quote
Old 08-24-2015, 01:43 PM   #15
nintendobratkat
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 47104
Join Date: Nov 2003
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2016 WRX Limited
White

Default

What does the red one look like?
nintendobratkat is offline   Reply With Quote
Old 08-24-2015, 01:46 PM   #16
SuperPro_USA
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 428745
Join Date: Aug 2015
Chapter/Region: BAIC
Vehicle:
2016 WRX
CWP

Default

Black x 1 please
SuperPro_USA is offline   Reply With Quote
Old 08-24-2015, 01:51 PM   #17
SteadyHawkin
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 428592
Join Date: Aug 2015
Chapter/Region: NWIC
Location: WA State
Vehicle:
2016 WRX Premium
ICE Silver Metallic

Default

Sign me up for the black por favor!
SteadyHawkin is offline   Reply With Quote
Old 08-24-2015, 01:52 PM   #18
Foomanchu
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 31321
Join Date: Dec 2002
Chapter/Region: TXIC
Location: San Antonio, TX
Vehicle:
2016 WRX
WRB

Default

In for black please!
Foomanchu is offline   Reply With Quote
Old 08-24-2015, 01:52 PM   #19
Boggie1688
Scooby Specialist
Member Sales Rating: (5)
 
Member#: 165955
Join Date: Dec 2007
Location: California
Vehicle:
2015 WRX Base
WRB

Default

Damn I want this......but....I shouldn't
Boggie1688 is offline   Reply With Quote
Old 08-24-2015, 02:02 PM   #20
oltrevf
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 425241
Join Date: Jul 2015
Default

I'm in! Black please!
oltrevf is offline   Reply With Quote
Old 08-24-2015, 02:09 PM   #21
Fsnoles1984
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 413824
Join Date: Feb 2015
Chapter/Region: South East
Location: ATL
Vehicle:
2015 WRX Premium
Crystal White

Default

What is the sound like with this intake? I had the ETS intake with box, but ended up selling it because for daily driving it was just too loud to me. Any idea on how this compares? Would love it for the performance, but don't want too much more sound in the cabin.
Fsnoles1984 is offline   Reply With Quote
Old 08-24-2015, 02:14 PM   #22
njeezy29
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 425481
Join Date: Jul 2015
Default

Count me in! Black please local pickup
njeezy29 is online now   Reply With Quote
Old 08-24-2015, 02:17 PM   #23
ProdigyAS
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 422665
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2015 WRX

Default

I'll take a black one please
ProdigyAS is offline   Reply With Quote
Old 08-24-2015, 02:18 PM   #24
luckylindy2.0T
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 414364
Join Date: Feb 2015
Default

Mark me down for one in red
luckylindy2.0T is offline   Reply With Quote
Old 08-24-2015, 02:25 PM   #25
shadow_772
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 287701
Join Date: Jul 2011
Chapter/Region: NESIC
Vehicle:
2015 WRX
WRB

Default

I'm down for one in black + a 3 port!
shadow_772 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 02:15 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.