Any one fitted a TSL group n back box to a hawkeye 2.5 sti ?
With or without the deresonated centre section ?
Loud enough ? or too loud ?
Any views or oppinions apreciated
Looks like good value for under £200

 

I did, without changing the resonated section and it was pretty quiet. I have since changed the resonator pipe and its much louder, but I've changed the group n for a typhoon.

Value for money and build quality - the group n is fab