Author Topic: Exhaust flange size (Read 2988 times)

supernutt · « **on:** August 04, 2013, 04:36:53 PM »

I got a aluminum exhaust flange when I bought my TRX5 pipe from ESR. The problem that I have is that it is smaller than the exhaust port on the cylinder. I have a couple other aluminum flanges laying around and they are all about the same size[ATTACH=CONFIG]1194[/ATTACH] as the exhaust ports what would these be used for? It seems that even the stock exhaust flange is bigger than this one[ATTACH=CONFIG]1195[/ATTACH]

matt250r21 · « **Reply #1 on:** August 04, 2013, 04:51:37 PM »

ESR has different internal diameter flanges, smaller diameter is suppose to help with lowend. They have stock diameter as well, not sure if they make a larger internal diameter flange, but I have scene a stock flange bored out 1mm over stock.

supernutt · « **Reply #2 on:** August 04, 2013, 04:53:08 PM »

They never asked or gave me a choice

Pumashine · « **Reply #3 on:** August 04, 2013, 06:41:39 PM »

The stock exhaust port is 1.740 tall and 1.800 wide. Some builders take that out to 1.860 wide. I have a stock flange here bored out to 1.860 which is 3mm over. You might want to ask ESR about what matt250r21 is saying about the different sizes and why?