Hi....names scott. I have a 87 IROC-Z/ 305 tpi/ little modified. I am goin to tell you a little about the car of its mods so far...cause im a new member...will show pics later of car and engine etc.

IROC-Z has msd ignition full setup, msd super conductor wires, boshe spark plugs, msd late model distributor cap and rotor, msd blaster coil, msd ignition box 6al. i have hedman headers, 3 inch cataco catalyist converter inlet and outlet high flow, 3 inch catback system from flowmaster single exhaust, muffler thow may not be an 80 series muffler, hypertech chip street runner, airfoil, all new vacumm lines and gaskets, rebuilt suspension front and back....GOT TO TELL YOU GUYS........STIFF AS A BOARD....POWERFULL GRIP AND STEERING, EVERY PART AND BUSHING BRAND NEW, slip posi rear ten bolt, 3.73 gears, deluxe ring and pinion and all bearings, basicly rebuilt to the fullest and new slip lube, b&m shifter, and full rebuilt tranny, but not high performance wise, but im sure it can with stand a 300 horses and maybe a nos kit, and other little cheap do it yourself mods and more future mods to come!!!
I want a louder sound...no not slp loudmouth but close enough......like can i be able to add on my existing exhaust maybe like glasspack exhaust tips or maybe just a glasspack muffler from thrush in the summit racing catalog? need to know what is the best way with out robbin back pressure or power. whatever the possiblility is i want a loud muscle sound!! even if it means gaining or loosing power or perfomrance.

p.s. i was at a light and a gta firebird or wanna be of one pulled up along side of me and reved his engine but it wasnt the engine that was kickin *** loud it was the back of the rear exhaust....i felt embarrased from it cause my car had a deep tone but he had what i really wanted the THUMPLE-IN POUND OF THUNDER!
but good news is my spinning tires and lttile mod engine pounded his *** to the grave!
thank you for your time,
scott