Someone that has this header, can you tell me what the OD and ID/wallthickness of the collected outlet is? I'm planning on making a custom exhaust but I want to know what the outlet size of the RB header is first...

 

Come on guys, I know someone has to have this header, or remember from experience...

 

The RB piping is much heavier than most shops carry. Somewhere in the specs on RB's site it should state the pipe size post silencer.

 

I was just confused about the whole racing beat sizing thing because they have you use the stock center pipe which is 1.75" ID. That seemed a little small to me for a performance exhaust setup. I was thinking of using a 2.5" OD with 1/8" wall thickness at least. That would bump up my ID to 2.25" which seems a little more sporty. But I was basically going to match my piping size to whatever the outlet on the header is. If that makes any sense....

 

i believe the header outlet is around 2" OD(I could measure it if you'd like when i go out to my shop later today). If you want to make a bigger midpipe you could buy a collector/reducer to adapt the headers outlet. don't bother w/ thick wall tubing after the header as the exhaust temps wont be nearly as high, plus it'll save you a lot in weight.

 

it seems like people are saying(over the internet) there isnt much power to be gained in changin out the mid pipe

 

I am basically going to match the pipe size on the Rb header but didn't know what it was. If it is the same as the stock mid pipe then I"ll just re-use mine. If the RB header outlet is bigger then I was going to go custom...

Jamie

 

I concur with the 1/8 thickness based on my spare RB headers.

 

All RB exhaust is T-304 Stainless and 1/8th thick, IIRC

 

^no stainless, just mild steel
i just got back from my shop...the header outlet is 1.75"ID and a 1.9"OD, 1/8" thick

 

post pics of your header when your done making it.

 

Right on. Looks like I'm staying with the stock exhaust mid pipe then. That just decreased my costs a little bit...