C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

what size exhaust pipes?

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Old Mar 6, 2006 | 01:26 PM
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lead foot 85 vet's Avatar
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Default what size exhaust pipes?

I'm going to install true dual exhausts...........were at 2 1/4 now, is 2 1/2 enough or do I need 3 inch..........3 inch would require new headers and mufflers.............the y pipe is 2 1/2 by 3 1/2 thats got to be killing me as it is with both 2 1/2 pipes going through it.............is two 3 inch over kill.
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Old Mar 6, 2006 | 04:25 PM
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I can tell you I love my 3" exhaust.




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Old Mar 6, 2006 | 04:35 PM
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depends on your HP and what not, got anymore details on the setup?
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Old Mar 6, 2006 | 05:05 PM
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Originally Posted by lead foot 85 vet
I'm going to install true dual exhausts...........were at 2 1/4 now, is 2 1/2 enough or do I need 3 inch..........3 inch would require new headers and mufflers.............the y pipe is 2 1/2 by 3 1/2 thats got to be killing me as it is with both 2 1/2 pipes going through it.............is two 3 inch over kill.
I am running a BB 3" through a set of EM long tubes. Glens car made 580 RWHP in 5th gear through a 3" BB and a H pipe with no CATs. I expect the same performance through a X pipe and a set of DTH 3" metallic substrate CATs once the car is totally tuned and ready to deliver.
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Old Mar 6, 2006 | 05:12 PM
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Originally Posted by lead foot 85 vet
I'm going to install true dual exhausts...........were at 2 1/4 now, is 2 1/2 enough or do I need 3 inch..........3 inch would require new headers and mufflers.............the y pipe is 2 1/2 by 3 1/2 thats got to be killing me as it is with both 2 1/2 pipes going through it.............is two 3 inch over kill.
If you are interested I have a 3 1/2 inch system with 2" headers for sale. Swaine coated with x pipe and mufflers.
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Old Mar 6, 2006 | 05:59 PM
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Originally Posted by Blown Vette
If you are interested I have a 3 1/2 inch system with 2" headers for sale. Swaine coated with x pipe and mufflers.
YIKES........were'd you find room..........anybody have a formula for air in air out.........seems like the c5 crowd is making insane hp with stock pipes...........any trouble fitting 3 inch?...........my 1 3/4 headers are hitting now...no way am I going to get 2 inchers in there.....tempting though.
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