From HFC to test pipes

Originally Posted by BOLIO 671

As per FI...resonators make no difference on HP/Power gains...The resonators only have an effect on the cabin noise/sound....the bigger the resonator the quieter it is...keep in mind that the 18" Resonated CBE is still lounder than stock...FI offers a more deeer tone...Going with TP's will give u rasp/hissing noise and give the exhaust a higher pitched sound compared to running HFC's.

TP's will give u more HP but seen mostly on the top...ending up with u losing torque in the low to midrange area...I personally think that HFC's are the best way to go....I mean how often are u gonna be running ur Z on the top end? And honestly would u be running it at high rpms for long durations?

Originally Posted by 1cleanZ

I'm strictly asking TP's vs HFCs, benefits vs cons.

And no, test pipes will actually give you a lower, deeper tone, not higher. Yes they may create a bit of rasp, but that's the intent of having resonators in both the TP as well as the Xpipe IF going w/ that setup.

Originally Posted by BOLIO 671

Nope not with the Z34's....maybe so with the G37, but from my personal experience with the VQ, TP's gave a higher pitched sound with rasp...closely similar to running LTH's....HFC's gave a deep tone for me....

But hey....sound is all subjective, especially in the exhaust department with these cars....what might sound high pitched to me might sound deep toned to u...hope u figure out what will sound and work best for you...I mean everyone could give you their take on whether to go HFC's/TP's but in the end its your car that you will be driving...

Originally Posted by BOLIO 671

Nope not with the Z34's....maybe so with the G37, but from my personal experience with the VQ, TP's gave a higher pitched sound with rasp...closely similar to running LTH's....HFC's gave a deep tone for me....