RK Sport Headers
Description: These headers are a free flowing exhaust manifold. They replace the stock (restrictive) manifolds. They are ceramic coated and look very pretty.
Price: RK Sport, Inc. $350.00
Install: Pain in the ass!
Pro's: Approx 5-7HP Gain. Makes the car sound a LOT better.
Con's: Pricey.  The flanges warped. Leaked for 2 months. Install was a bitch.
After months of leaks I finally had the Y-Pipe mig welded to the primaries. Sounds AWESOME now.
Verdict: The sound makes this mod well worth it. $350.00

3" Catalytic Converter + 3" S-Pipe
Description: The S-Pipe is the pipe that connects the catalytic converter to the I-Pipe.
Price: Iggy's Custom Muffler Shop $200.00
Install: Iggy's Custom Muffler Shop ~$90.00
Pro's: Makes entire exhaust custom.
Con's: Costs money.
Verdict: I'm all custom baby yea! $290.00

B&B Tri-Flo 2.5" Intermediate Pipe, Quad Tips
Description: Cat-Back muffler.  Comes with the I-Pipe, Muffler, and Quad Tips.
Price: T. Byrne Motorsports $649.99
Install: Iggy's Custom Muffler Shop $100.00
Pro's: Average 11.5HP 15.7TQ Gains. Sounds great! The quad tips look amazing! Its stainless steel and won't rust.
Con's: Very expensive!
Verdict: If you want the best and are willing to pay for it, then the Tri-Flo is for you! $749.99