what size exhaust pipes?

[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.

[Matt383]

I can tell you I love my 3" exhaust.




Matt383

[mn_vette]

depends on your HP and what not, got anymore details on the setup?

[tjwong]

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.

[Blown Vette]

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.

[lead foot 85 vet]

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.