running t3/t4 stock gsr setup, down pipe 2 1/2 in, 3 inch catback but muffler inlet is 60mm. will this affect performance?

 

um.. yea

 

lol of course it will.

I suggest buying a cheap 3'' greddy evo style muffler on ebay. They sound awesome and make power.

 

how much is 80 mm converted to inches btw, i was thinkin bout gettin the apexi n1, most were 60mm but this one seem way bigger.

 

80mm is 3.15 inches.

I really do recommend the greddy knockoff on ebay...it's built very nicely, is incredibly cheap, and sounds a hell of a lot better than the Apexi N1

 

which one exactly, brand? i'll put that into consideration..

 

OBX.
http://cgi.ebay.com/ebaymotors...ZWDVW

The silencer is of course removable, it's still not loud without it.

I have one on my 2.36'' piping N/A b16 and I love it.....going to switch out for 3'' once I am boosted.

 

looks nice but i guess i'll stick with the actual n1, my cuz just got the obx spoon immitation and it sounds really smooth. i'm not really into immitation stuff. you will love the boosted b16 but the back pressure will kill you if you have none, mine ran like **** after the catback weld blew off on the stock muffler.