Im stuck. I dont know what to do. Im torn between the GTM res test pipes or Berk HFC's. I want more sound out of my exhaust, but i cant deal with drone. I dont mind it loud when i want it loud. But, i cant deal with drone while cruising haha. As anybody here had either set up, or switched set ups for one or the other for lack or, or too much sound? Also, has anybody noticed an difference in power from switching from HFC to Test pipes, or loss of power from switching from Tp back to HFC's? My current exhaust set up consist of magnaflow mufflers, and magnaflow resonators with otherwise stock pipe between the magnaflow components. The exhaust sounds nice now, but i want more sound, and more power would be nice haha. I searched but couldnt find any real direct comparisons.

 

i had berk hfc, nice gains, but i sold them to go with resonated TP's lol im still decided on which ones to buy or to make my own lol. But I would say TP's but thats just me

 

The G37 is too heavy to notice 3-4whp gains so your butt dyno won't read accurate with respect to gains.

Anytime your replace your OEM cats your call will drone and that's a fact! I went from Non-Res to Resonated and I've heard HFC + Cb combo and they all drone to an extent. It honestly is a matter of getting used to it.

It drones at 1.5-2.2k rpm, so just cruise at 2.5k-3k and you should be good

 

did you notice a difference per the butt dyno after going with the test pipes?


I also have a 5AT, so cruising interstate is usually around 2.5-3k anyway. Thats my main concern as i dont do much cruising in around 40-50

 

lol. its a test pipe, its going to give more power regardless of the brand. Test pipes are also louder. But with the GTM brand on there you know the product lives up to it's name so it's even better. So my decision? GTM TPs In my opinion. I had FI HFC and then I switched and went GTM TPs and never went back

 

Well bit the bullet and went with the GTM RTP! Now the anxious wait starts haha. Guess i better start hitting those bolts with some PB blaster asap haha

 

I'm torn also between rtp and hfc and I have fast int HFC and want more of the beutiful purr.

 

I guess GTM RTP !

 

That's the boat I was in. I didn't want to go xIth hfcs and still want more sound. So I figured I might as well go all out and do rtps.

 

I meant I'm torn between Hfc and Rtp I currently only have CF Catback and I'm debating on 1 of them and can't descide ! Videos suck and need to hear in person

 

I have berk HFC and they are good for me. They do make your exhaust louder but not raspy. I did not go with test pipes because i do no want any rasp but i am sure resonated test pipes will be less raspy.

 

Yea i didnt want to get HFC then still want it louder and wish i went with RTP. Worse comes to worse, the RTP is too loud for me after break in, i know i can always find somebody who will buy it and i can go the HFC route....but after hearing every setup with RTP, i doubt im going to want to get rid of them haha

 

Dont RTP & HFC have the same function? So in essence wouldn't they sound the same (loudness)? I mean i doubt someone can tell the difference between a RTP + exhaust vs HFC + exhaust. They both are going to be loud.

 

Kind of hard to ask less drone when you free up your exhaust with nonresonated test pipes. Just oneof those sacrafices you'll have

 

Well test pipes, resonated or not are going to outflow HFC's. Anytime you increase volume you're going to increase sound. So test pipes will add more sound and power vs HFC's. Thats why i went with resonated test pipes for the sound and power without the harshness of just a non resonated test pipe.