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Old Sep 13, 2016 | 02:01 PM
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Default 3.5" y pipe

Hello I just purchased some tsp 2" headers with 3.5" collectors. I wanted to see some 3.5" y pipes or full exhaust setups. Car is primarily used for track use.
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Old Sep 13, 2016 | 11:22 PM
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Kooks used to make one. I think they no longer make it?
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Old Sep 14, 2016 | 12:09 PM
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I will be ordering those headers soon. I will be custom making a y pipe for them.
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Old Sep 15, 2016 | 02:40 PM
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I run Kook's 2" headers w/3.5" collectors. I fabricated and put together an exhaust system that you might like as well. I will post pics when I get home.
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Old Sep 16, 2016 | 10:48 AM
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Originally Posted by BOLO
I run Kook's 2" headers w/3.5" collectors. I fabricated and put together an exhaust system that you might like as well. I will post pics when I get home.
We're waiting!
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Old Sep 16, 2016 | 03:44 PM
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Mine is not a Y pipe but my tranny is out now and these are laying on the floor so here you go. Under $100 total investment, 2 4' sticks 3.5" pipe and 2 3.5" cherrybomb extreme mufflers. Only have 3 runs on car so no comparison between through mufflers and open header.
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Old Sep 17, 2016 | 08:55 AM
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Well I just sourced the stuff to custom make a 3.5" to 4" Y pipe, bill was $130 from Summit and $75 for a merge on ebay. 3.5" merges are hard to come by. I ended up getting a Howe merge thats a 5" bellmouth exit and Im just gonna cut it back to where its 4". At summit I bought 2 long u-bends, two header slip connectors, two lap clamps, and one 4' piece of straight pipe. Should be making it within the week.
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Old Sep 17, 2016 | 11:16 PM
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I fabricated this all stainless steel 3.5 inch mufflers and turn downs. For race only/ this thing is freaking LOUD





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Old Sep 18, 2016 | 02:16 AM
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that must be a loud s.o.b
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Old Sep 18, 2016 | 07:12 AM
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I wonder if that would pick up much over dumped x pipe set up
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Old Sep 18, 2016 | 01:14 PM
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The simplicity of running dumps is always enticing. I just cant stand the noise in the car. Even just putting a 90 on the end and pointing it out under the rocker make a huge difference in cab noise.
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Old Sep 20, 2016 | 01:03 PM
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As mentioned, for RACE only! Yes it's freakin' LOUD!
Lightweight also plays a big factor.
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Old Sep 21, 2016 | 09:12 AM
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01ssreda4 was it patriot brand piping?
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Old Sep 21, 2016 | 04:39 PM
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Originally Posted by SPOOLIN Z28
01ssreda4 was it patriot brand piping?
I have built a ton of custom exhaust over the years. Every single time I buy mandrel pre bends from summit. I select whatever brand bend is cheapest on their site. Lots of times its summit brand (obviously made by someone else). The merge I select was Howe Racing, a company ive never heard of. It actually all showed up today. I will be posting pics soon.
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Old Sep 23, 2016 | 03:23 AM
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Originally Posted by 01ssreda4
I have built a ton of custom exhaust over the years. Every single time I buy mandrel pre bends from summit. I select whatever brand bend is cheapest on their site. Lots of times its summit brand (obviously made by someone else). The merge I select was Howe Racing, a company ive never heard of. It actually all showed up today. I will be posting pics soon.
Yep, the cheapest mandrel pipe is the pipe for me.
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Old Oct 4, 2016 | 10:17 AM
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Any updates on your y pipe?
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Old Oct 6, 2016 | 01:27 PM
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Its done and installed. I need to get pics up.
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Old Oct 8, 2016 | 02:40 PM
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This was done on my 3rd gen, so not to sure how much difference it is between a 4th gen

3" primaries into flowmaster 3"-4" y-colletor, 4" cutout reduced back to 3" to the catback

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Old Oct 8, 2016 | 03:35 PM
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They dont make a 3.5" flowmaster merge, and that's what this thread is about.
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Old Oct 8, 2016 | 05:16 PM
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Originally Posted by 01ssreda4
I will be ordering those headers soon. I will be custom making a y pipe for them.


Adding this:

Ordered up some random pipe pieces and clamps.



In this picture you can see the Howe racing merge, 3.5 to 5 inch, and my old 4" bullet muffler I plan on reinstalling.



This merge obviously was too big so I ended up cutting it back about 3 inches so it would mate up with 4 inch pipe.



Here is the completed Y pipe and merge.



Had it coated with high temp powder.



From another thread.
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