[Reno5658]

I 'm planning on maybe increasing or decreasing the exhaust pipes from the headers and on out. I plan on using oem cat and performance exhuast. Does anyone know the diameter of our exhaust pipes?

 

[GenIILegend]

The diameter on the stock piping is 1 7/8". Make sure you don't get piping too much bigger than 2 1/4 cuz you'll eliminate backpressure and your low end torque will go with it.

-GR

 

[Reno5658]

wouldn't 2.5" be reasonable? I would like to customize my exhaust and try to get the most out of it. Has anyone tried this and have pics of it?

 

[GenIILegend]

wouldn't 2.5" be reasonable? I would like to customize my exhaust and try to get the most out of it. Has anyone tried this and have pics of it?

It would be reasonalbe, but not necessary. What would putting a bigger pipe on there accomplish? Legends are already pretty weak in the low-end department, so killing your backpressure is just going to magnify the problem. The only reason I could see getting an exhaust that big would be for forced induction applications.

-GR

 

[RICDOGG]

i would think that having stock headers will create enough backpressure that widening to 2.5 would be beneficial for the topend. backpressure is still maintained by the stock header

& 2n1/4" pipe was "recommended" for my LS'd CRX. my legend pushes waaaay more air then then my LS motor. i say go for the 2.5" exhaust.

 

[SeaSickLegend]

wouldn't 2.5" be reasonable? I would like to customize my exhaust and try to get the most out of it. Has anyone tried this and have pics of it?

I used 2.5 for my duals. I noticed a considerable increase in the top end and a lag in the low end. Not too bad but still noticeable. I plan on correcting this with Headers and another little project that im working on.
If you want to see pics from undr the car, just click on my sig.

 

[Reno5658]

Wow seasick! good job!...how much did that run you? Ok, did you start the 2.5" piping after the headers or the cat with the "y" connector? i might go get the mufflers on ebay and put duals on mine.

 

[sleeprlegendcp]

My mechanic is using 2 1/4 pipe for my duals. My system goes from the header into one cat then splits and has two seperate mufflers. Now my exaust system is by no mean ordinary, you won't know until you see it, but this should help you.

Remember that 4 cylinder headers take all the exaust in one header. V-6's use two headers to mover the total amount of exaust. IE 2 1/4 inch headers = 4 1/2 inch headers on a 4-cyl
Later!
Lee

 

[SeaSickLegend]

Wow seasick! good job!...how much did that run you? Ok, did you start the 2.5" piping after the headers or the cat with the "y" connector? i might go get the mufflers on ebay and put duals on mine.

Thanks bro,
It ran me about 7-800 with me working on it too.
I started after the Y, I plan on getting headers before the end of this year and will be will take care of the frontal part of the exhaust once I instal my headers.