Hey guys im in the process of building a b20 vtec with 11.5 to 1 je pistons and portflow head and jun 3 cams. I wanna use a mugen twin loop axel back and t1r b pipe. Do you think if i run this exhaust i will lose some power. I really dont wanna do custom piping cause i gonna be gettin a good deal on the mugen and t1r. Also love the sound of the exhaust.

 

It depends on what TL you order. I'm pretty sure all the rear sections only aren't quite 2.5". It's more like 2-3/8". Thats what mine is anyways. Not sure if there are any bottlenecks in the T1R midpipe. Try searching in the Type R forum, I remember there being several posts about it.

You will be better off just ordering a kteller 2.5" exhaust system.