I suppose you could say "quality" is also a difference. There have been a couple threads which mentioned cracking on TP welds. I believe berk and T1R have both proven themselves to be quality products.

As far as power, regardless of what you've heard TP's do not make much power. Close to no gains as a matter of fact. They will change the sound of the exhaust though.

If sound is your goal you may consider having the resonator removed from your stock exhaust. That is a good alternative to a TP.

There are a lot of down sides to TPs that are being overlooked.....

 

T1R testpipes have rattled when the cat heatshield is used and some of the tabs have broken off.

i have invidia and i just took mine off cause i dont need the extra power right now, and the smell was getting annoying

 

what's the sound difference between T1R or J's?

 

Berk is an awesome testpipe, plus its only 99 shipped. No complaints just installed the berk testpipe, with a megan header, and a 63mm single T1R exhuast all I can say is wow plus it sounds really nice all the way through the rev range

 

does anyone have a berk pipe with stock exhaust and get alot of rattling? ive retorques everything and i get a rattle no matter what

 

I was going to swap my Invidia for the T1R and use the heatshield. I might have to re-think that.

Anyone else with this problem?

 

get the berk TP!!

 

where is it 99 shipped? i found 125 shipped lmk so i can pick one up maybe

 

Just look in the group buy threads, you will see it

 

Or email here: bryan@berktechnology.com