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Sonic Mk3 Crew #00
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Not real impressed... Could sound so much better. Tail pipe leaves so much to be wanted...

Why not go bigger than 2 1/2"???
 

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Not real impressed... Could sound so much better. Tail pipe leaves so much to be wanted...

Why not go bigger than 2 1/2"???
This! But I'm pretty sure buschur sells their catless downpipe seperate from the exhaust. So 3" catless DP + 3" FSWerks catback would probably = awesomeness!
 

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I dynoed my Eclipse and with a +1 size turbo up from stock I had a 2.5" turbo back setup and I swapped over to a full 3" and saw zero gains til I went up another size turbo and was pushing near 400 at the crank and then the 3" size was actually worth it.
 

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Stock is 2.5". Most aftermarket (FSWerks, Borla, Magnaflow) are offering 3". They just missed the boat.
Just because that is the most requested size, and therefore very popular, does not mean it is the best performing. Most aftermarket stuff for late models isn't about improving performance as much as aesthetics.

When a shop does good R&D for improved performance, you get people that want something different because they think will perform better, despite the testing and development done.

When I was hotrodding my first BBC, I went through four different cams until I finally listened. Then I got the tiny little cam Alan recommended that wasn't very "high performance" in my mind and went the fastest. Probably should have just taken the advice of the guy that builds BBC race motors and owns a dyno.
 

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I spent a lot of time at dynos watching people throw on 3" exhaust on their cars and see horsepower drop in the low range and net slower 1/4 mile times. People need to research this stuff instead of just following the gang which happens alot in the enthusiasts world.
 

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What do you mean by "take"?
Well i havent tried it but hasnt tom and a few others said/gotten good results with a 3"? Dont know about the st, but i have yet to see dynos of 2 1/2 vs. 3" on the same car same day same dyno.

Same was said in the gencoupe world. I did 3" and got a better overall hp/tq curve with a 3" single exit. I guess only time will tell for the st
 
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