I'm currently running T1R 70R Sparrow dual exhaust with regular 70mm Testpipe. I'm wondering if anyone here has experiences in both regular TP and a resonated TP. What's the difference in terms of the sound, like loudness? Also I only see 63mm resonated testpipe by T1R, and never seen a 70mm resonated testpipe. Nobody makes 70mm resonated TP I guess...?

Thanks in advance for the help.

 

No doubt the resonated TP reduces DB levels...but i've read some where that its not a noticeable difference, but take note that this is only from a single person's perspectives.

 

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Resonated test pipes do help a bit in reducing drone, but they don't make a huge difference. They have resonator chambers built in, but are not packed with the extra sound deadening material like you see in the exhaust resonators.

 

How about a high-flow cat?

 

Very good info 604S2000. Thx.