well yea i just installed the Apex GT spec on my 90 GTU and damn it has a great tone. i originally had just a race pipe on my car and it was freakin loud, but the GT spec lowered the noise and gave it a great deep tone. i also noticed a great increase in power. backfires are still loud, but the flames are crazy. even tho it may cost a pretty penny, if you got the money i strongly suggest it.

 

wow thanks, i also have rotary dreams like you..thanks a bunch about the info dude..
haha jp. this guy is a friend of mine, and the GT Spec catback is real nice. Real nice deep tone and nice increase on power.