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Old 10-29-2014, 12:45 PM   #1
KillerBMotorsport
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Default 2015 WRX J-Pipe (downpipe) and Intermediate Pipe RESULTS

In typical Killer B fashion we do things a bit different. This J-Pipe and Intermediate Pipe utilize Custom CNC Formed Mandrel Bends. We do not use a standard 3.5" taper coming off the turbine housing, we perfectly match the housing for perfect turbulent free flow. The bend is larger, more free flowing, than the competition. We use ALL 1/2" thick stainless flanges. Custom designed flanges (and custom gaskets) allow you to just replace the J-Pipe OR Intermediate pipe for biggest bang for the buck (the J-Pipe) and still work with the factory intermediate to keep things quiet and clean (retaining the factory second car and resonator). As with all our products, MADE IN THE USA and Lifetime Warranty.

Results shown are a factory stock car with an OTS Cobb Stage 1 93 map vs tuned with ONLY adding the J-Pipe and Intermediate Pipe. A protune or custom tune is required to run safely with these components...





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Old 10-29-2014, 12:50 PM   #2
KillerBMotorsport
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Driving impressions... MUCH more responsive! The first thing you notice is how much fast this FA comes onto boost. Gains EVERYWHERE in the rev range and it definitely hold on longer into the revs. With the gains people have been showing with a cat-back I am really looking forward to our next tuning session with our prototype cat-back system. It can only get better!

This is obviously a low reading dyno, but with the taller WRX gearing, this car pulls more like a stage II STi as it stays in the boost much longer, and does not have the typical 5,700RPM power drop off like the older EJ engines.
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Old 10-29-2014, 01:35 PM   #3
ColdSoda
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Any ETA for the full TBE exhaust? I see the options on the website to buy the jpipe and intermediate pipe now - are they ready for purchase?
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Old 10-29-2014, 02:26 PM   #4
bunz559
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That looks awesome to hear about the design with not taper! Looks good!
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Old 10-30-2014, 08:30 AM   #5
KillerBMotorsport
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Quote:
Originally Posted by ColdSoda View Post
Any ETA for the full TBE exhaust? I see the options on the website to buy the jpipe and intermediate pipe now - are they ready for purchase?
TBE we do not have an ETA for. It was one of those things we did out of necessity, and I did not like any of the market offerings. We'll be bringing it back to the dyno to see what it adds. I see a lot of big numbers coming from other manufacturers, but I feel there is some fluff there. We'll see for ourselves soon enough.

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Originally Posted by bunz559 View Post
That looks awesome to hear about the design with not taper! Looks good!
There is some taper. There needs to be to accommodate the turbine housing that's just over 3" at the exit. We just don't use 'standard off the shelf tapers' to make a product. Our taper has the narrowest included angle that can be used in the space and opens up to match the turbine exit perfectly for smooth turbulent free flow. This was an investment in custom tooling on our part, but in typical Killer B fashion; if you're going to make a product, make it the best it can be. Same holds true for the first bend (and the others), it's non-standard and as large as space and process permit, providing the maximum flow capacity and lower turbulence vs a tighter bend.
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Old 11-01-2014, 01:09 PM   #6
SickNasty
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Looks like I may be getting this J-Pipe
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Old 11-01-2014, 05:07 PM   #7
_brian_
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This looks catless to me, are there plans to make a catted version?
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Old 11-02-2014, 03:02 AM   #8
ninjaboy76
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So you can purchase just the "J" portion of the pipe and install it to the factory intermediate pipe, or purchase both the "J" portion and the intermediate pipe together for a complete pre TBE combo? Any idea what kind of gains can had with just the "J" portion of the pipe being installed? I'm one of those guys that's wanting to keep things nice and quiet.
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Old 11-02-2014, 06:17 PM   #9
hekler
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Quote:
Originally Posted by ninjaboy76 View Post
So you can purchase just the "J" portion of the pipe and install it to the factory intermediate pipe, or purchase both the "J" portion and the intermediate pipe together for a complete pre TBE combo? Any idea what kind of gains can had with just the "J" portion of the pipe being installed? I'm one of those guys that's wanting to keep things nice and quiet.
I agree....me too.....looking forward to this update.
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Old 11-03-2014, 01:44 PM   #10
MG9783
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Did you guys experience any check Engine lights or the protune basically eliminated that?

Im wondering why companies like ETS used a 90 degree bend on the second o2 sensor to avoid a check engine light.
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Old 11-03-2014, 06:10 PM   #11
poodlchu
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Super interested in getting this, I see it is up on the site to buy. Is that just to pre order and if so when is an expected time frame?
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Old 11-04-2014, 09:57 AM   #12
KillerBMotorsport
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Quote:
Originally Posted by SickNasty View Post
Looks like I may be getting this J-Pipe
Awesome

Quote:
Originally Posted by _brian_ View Post
This looks catless to me, are there plans to make a catted version?
We're still going over specs with different Cat manufacturers. It's been slow going, but we hope to eventually offer a catted intermediate.

Quote:
Originally Posted by ninjaboy76 View Post
So you can purchase just the "J" portion of the pipe and install it to the factory intermediate pipe, or purchase both the "J" portion and the intermediate pipe together for a complete pre TBE combo? Any idea what kind of gains can had with just the "J" portion of the pipe being installed? I'm one of those guys that's wanting to keep things nice and quiet.
Correct. The J-Pipe alone should provide the largest gains and costs less. When we come out with out intermediate with a cat it should be similar to stock as far as sound levels. I'm actually supposed at how quiet this car is even with our single muffled cat-back exhaust.

Quote:
Originally Posted by hekler View Post
I agree....me too.....looking forward to this update.
See above

Quote:
Originally Posted by MG9783 View Post
Did you guys experience any check Engine lights or the protune basically eliminated that?

Im wondering why companies like ETS used a 90 degree bend on the second o2 sensor to avoid a check engine light.
JrTuned performed the Protune and we have no check engine lights

Way back years ago there was a CEL delete mod that would put the O2 out of the exhaust flow to prevent the check engine light from coming on. I'm guessing this is why others have done that funky O2 tube thing. This modification should have a tune anyway to have the engine run properly and reliably. With the right tune there should be no check engine lights.

Quote:
Originally Posted by poodlchu View Post
Super interested in getting this, I see it is up on the site to buy. Is that just to pre order and if so when is an expected time frame?
This is for pre-order. We've made a few small batches and are getting into production. There is a small backorder list, but we'll be catching up on it.
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Old 11-15-2014, 12:15 PM   #13
stealth06wrx
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Killer B, would there be any advantage/disadvantage to have the cat right next to the turbo like Cobb seems to be doing. I cant find much about cat placement and why you would want it in one spot or another...I like your "if we're gonna do it, we do it the best" mentality and hoped you may have some thoughts about cat placement in the j-pipe
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Old 11-15-2014, 04:00 PM   #14
KillerBMotorsport
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Personally, I wouldn't run a cat in the J-pipe. It's turbulent enough as-is being at the exit of the turbine, plus that first bend is substantial. For a cat to have the least amount of influence (ie; increased backpressure) it should be in a straight section. Ours will be in the intermediate pipe.

As far as distance from the exhaust ports that only effect the light-off time of the cat (time it takes to get up to temp and functioning), but the differences in time moving it a few feet further down are marginal at best. So in the end, it's effectiveness is still the same
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Old 11-17-2014, 09:44 AM   #15
Silvir05
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Please make the j pipe for the Foz too!

Sent from my SM-G900V using NASIOC mobile app
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Old 11-17-2014, 10:32 AM   #16
KillerBMotorsport
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^ FOZ on order and it's not very different from the WRX version
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Old 11-18-2014, 09:49 AM   #17
ahughes
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Are you guys going to post some info on this pipe on your website soon?
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Old 11-18-2014, 02:06 PM   #18
KillerBMotorsport
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^We're in the process of updating the website to a completely new format. What did you want to know?

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Old 11-21-2014, 08:03 AM   #19
KillerBMotorsport
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Here are some pics of the 1-Piece design.







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Old 11-21-2014, 10:32 AM   #20
ColdSoda
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niiiice... any chance for a one-piece with cat?

Looking forward to more from killerb! Good work guys
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Old 11-23-2014, 03:52 PM   #21
ninjaboy76
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What's the price of the single piece design?
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Old 11-24-2014, 07:58 AM   #22
KillerBMotorsport
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Quote:
Originally Posted by ColdSoda View Post
niiiice... any chance for a one-piece with cat?

Looking forward to more from killerb! Good work guys
A little ways off, but that is in the works!

Quote:
Originally Posted by ninjaboy76 View Post
What's the price of the single piece design?
The 1-Piece J-Pipe/Intermediate will is $671.

Here's another posting on the J-Pipe only (with accompanying Protune)...

https://www.facebook.com/primemotori...type=1&theater
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Old 11-24-2014, 01:12 PM   #23
hekler
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Is that right? 50 hp gain by just installing the front j pipe? Please confirm....
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Old 11-24-2014, 01:50 PM   #24
KillerBMotorsport
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^ and tune
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Old 11-24-2014, 04:09 PM   #25
bunz559
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WOW! Yo necesito un J-Pipe e Tune!
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