Re: side exhaust probs
backpressure creates torque, but limits top end.
free flowing exhaust creates top end, but limits down low torque.
right now, up top, youre engine is starving for air. and the added drivetrain loss of a automatic isnt helping much. some p&p heads and upper/lower plenums ought to help out, possibly cams also. but youre still being held back by the auto. beef it up a little(shift kit, higher stall torque convertor) and it should beef it up a little. also a rear diff with higher gearset(3.73 or 4.1) would help out immensly with an auto.
btw your exhaust setup sounds fine. and i think i found some of those dual slanted round tips(cobra r style) on ebay once. btw do you have the roush side tips? id take them off your hands if your looking into different ones.
1998 Eclipse GST Spyder - 14b turbo | 3" Catback | Evo8 BoV | 170fwhp if that
2003 Redfire Cobra - 448whp/435wtq - Sold