i Ran the strup 4-1 header with strup exhaust and custom 2.5' downpipe. Loved the sound of the strup, and the performance gain was noticable as well.

only got rid of it because now im boosting =)

 

Magnaflow 22" 4" round magnapack for res swap and magnaflow 14" 5" round out back $150 from amazon for both $75 at local shop to weld them up!

 

Sounds good only when throttle is pushed hard, right? Are you noticing a difference in HP or TRQ? Looking to do this myself with the Ebay knock off and trying to get everyone's input. Not looking for sound only but HP and TRQ increase. If it sounds loud when punched hard I can live with that. One thing I don't want to be labled is one of those fart can kids.

 

Your not really going to get any power from a catback on a 4banger. You could do full exhaust including new header to remove both cats but for what? Not really going to gain much except for noise.