hey guys, i have a HKS hi power hooked up with a t1r test pipe..I had the t1r 70mm so so this test pipe is also 70mm. Is there any effect of having the larger piping test pipe with the smaller diameter HKS? Car runs beautiful either way, just wondering because someone stated that that will cause turbulence in the exhasut, whatever that means.

 

Can you post a sound clip of your exhaust combination?

 

ill do it later today, friend has my camera right now