Today My friend & I spent the whole afternoon at the shop changing his muffler and catback for his 98GXE.
Now it's loud as hell. It's so loud that other ppl's car alarms start to go off when he drives by. He spent $300 total. I got to drive his car afterwards and I noticed the change in performance but the loud noise kills everything. He's completely regretting it. I don't want the same thing to happen to me when I change my exhaust.
Do all performance mufflers make alot of noise or is it just the cheap ones?. Should I just wait for Greddy?

 

Warning: GReddy will be very loud. Y pipe + GReddy - RT Cat is extremely loud.