Welcome to the North American Subaru Impreza Owners Club Sunday February 26, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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. 
Closed Thread
Thread Tools Display Modes
Old 08-31-2008, 04:32 PM   #1
Scooby Newbie
Member#: 187121
Join Date: Aug 2008
Default Going stage 2, which downpipe?

I currently have a cobb accessport and an HKS hi-power catback (up for trade if anyone is interested) and i am looking to go stage 2.

I cannot decide however on catted or catless downpipe, the smell of catless does not bother me I am just worried about a catless being too loud and thus making my car even more of a cop magnet.

How much louder is a catless downpipe than a catted (ex: cobb's downpipe with high flow cat vs HKS or invidia catless)?
* Registered users of the site do not see these ads.
ron231 is offline  
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-31-2008, 04:38 PM   #2
Scooby Specialist
Member#: 68647
Join Date: Aug 2004
Chapter/Region: MAIC
Location: Richmond, VA
07 STI 35R


Well you already have one of the loudest cat-backs available, so adding a downpipe will make it that much louder. Catless compared to catt'ed is a significant difference in sound also. If cops are an issue in your area, I would pay the extra couple bucks and go catt'ed with the HKS exhaust or drop the HKS and go with something quieter and go catless. I live in Richmond, VA and the cops here are complete ass's when it comes to exhaust tickets. However my catless Borla Hush exhaust never got me harassed by the po-po.

I actually just went stage 2 myself in my 07 STI yesterday and have the SPT 3" cat-back paired to a Crucial Racing downpipe and cat-less midpipe. Very quiet in both sound and apperence so I'll be surprised if I get harassed with this combo also. My first cat-back was the HKS Carbon Ti and I had to sell it because the tickets were amounting to more than the exhaust was brand new.
Steve.804 is offline  
Old 08-31-2008, 04:47 PM   #3
Scooby Specialist
Member#: 155876
Join Date: Aug 2007
Chapter/Region: MAIC
Location: Pittsburgh
2007 STI
Blouch Dom3


is noise the only consideration in your decision? Go catted if it is. Not only will it be slightly louder, catless tends to make more "pop" sounds that can attract bad attention.
b0nd18t is offline  
Old 08-31-2008, 05:12 PM   #4
👏 Big Ron 👏
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
on car parts so PM
me b4 j00 buy


Read the sticky threads BEFORE posting.
Unabomber is offline  
Closed Thread

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Going stage 2!? Need help deciding which route to go! chrisbugeye82 UTEC 1 10-23-2009 01:43 AM
VF-34 stage 2... which injectors? ein86 AccessPort 5 08-22-2008 06:16 PM
Got my downpipe...going Stage 2 soon Shewillbemine Southern California Impreza Club Forum -- SCIC 14 04-04-2007 10:54 AM
Do I need a downpipe if I am going Stage 2 on an 06 STI??? STix66 AccessPort 2 05-24-2006 01:44 AM
Cobb Stage 2 without downpipe Lordhowe Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 20 10-16-2003 01:18 PM

All times are GMT -4. The time now is 07:00 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.