Join Date: Jun 2015
Location: Southern New Jersey
I can't say that I know any more than the average about exhaust dynamics, but I tend to agree with PBSTN's tuner guy that there wouldn't be that much difference between the 09 stock catless header and the X-pipe on the stock 96 engine. You don't mention how you are going to upgrade the engine for your bike. Are you going to bore and/or stroke your 96 engine or are you thinking new larger engine? As I'm sure you know, there are lots of choices for increasing the cubes and power for your 96 as well as many complete engine choices. The difference being a whole new larger cube engine change may mean the 96 header can't be reused. I cant say that as a fact, since I've never had a 96 engine. But now the comparison changes since the newer Harley twin cam engines put the cat back into the header and they are shaped different than the 09 header and not as smooth flowing. So the X-pipe would flow better than the decatted newer twin cam headers, how much better, only a dyno tuner could tell. There is another issue with the 103 twin cam header according to V&H. They claim the O2 sensors in the stock header are too close to the merging point of the front and rear pipes coming from the exhaust ports, causing cross contamination and inaccurate O2 sensor readings. This may be a sales ploy but V&H's x-pipe header does relocate the O2 sensors further from the merging point. Many other header makers have the O2 sensor ports very close to the engine exhaust ports as does the new M8 engines. With all that said, I had a decatted stock header on my 15 RGS 103 Stage 1 with the FP3 tuner and it ran great with very noticeable power increase. It all comes down to what you believe and how big your wallet is.
Last edited by NickyNuts; 01-21-2019 at 11:09 PM.
Reason: omitted words corrected