I have a JDM EG6 civic SIR2 that i have recently put a JDM Integra Type r engine in to.

I got a down pipe with the engine that is over 50mm final bore. I need a cat so i can use the flange to make a de-cat pipe so i got the breakers to send me an old cat. however, the one they sent was too small a bore but they said it was off a teg type r. I got them to send me another downpipe so I could compare. This one measured 42mm bore and they insisted it came off the teg.

Basically, what size should the final bore be on a teg type r downpipe. I will obveously use the larger one but still would like to know what is going on.

Also, I ordered a Supersprint stainless header for the teg type r and it had a 48mm bore!! What does the likes of DC sports use???

Sorry for all the q`s but it will be handy to know.

Cheers in advance.

 

Taken from VTEC.net



In order to make exhaust air flow smoother, there are no sharp angles in the header. Furthermore, in order to lighten/strengthen the parts, stainless steel was used.
Impossible to do in mass-production, all exhaust piping is welded together with no sharp edges throughout. Also, the piping was upgraded to 57.2mm throughout to increase air flow.
The muffler is a multi-chamber design, and does a wonderful job of dissipating sound. However, the funnel-shaped piping in-between the chambers makes it a very free-flowing exhaust.

I believe the DC Sports JDM header is 2.5in for the collector. What that is in mm I cannot remember.... HTH

 

Anyone know what bore the type r should have??