Exhaust ---------------------------------------------------------

The exhaust system on my car is almost entirely custom, using a modified stock header, a high-flow catalytic converter and two Magnaflow mufflers.  Everything is made from stainless steel and the mufflers are polished.  I'll be polishing the rest of the system eventually, too.  Here is the entire system from front to back:

Header
The header is the stock 4-2-1 stainless steel tubular manifold with a few modifications.  The 6 bungs for the heat shield have been cut off and smoothed, and a bracket was fabricated on the bottom flange to bolt to the windage tray for added support.  This was necessary to support the added weight of the 3" tubing and bigger mufflers.

Once that was all done, it was shipped off to Jet-Hot for ceramic coating, using their Extreme Sterling finish.  This particular coating is slightly duller than their popular Sterling finish, but is claimed to hold its shine to a higher temperature, necessary for the supercharger I will be adding.

And here it is on the car.

Catalytic Converter
The high-flow cat pipe is from Central Florida Motorsports (CFM).  It is a polished stainless piece using 2.5"ID tubing, and uses a Carsound (Magnaflow) catalytic converter to flow better than stock.  Dyno tests have shown a ~5% increase in HP and torque at around 4k rpm with no losses anywhere along the power band.

Flex Pipe
The flex pipe is the next piece, and had to be custom fabricated using a 3"ID flex, 2-bolt flange for the cat pipe and a v-band flange to connect to the "muffler section."  In retrospect, I would have liked to use a longer flex piece, so I may change that out in the future if it does not hold up.

Muffler Section
The muffler section is a real piece of art.  A huge, 30" long polished Magnaflow resonator takes up the bulk of the length and provides the deep tone while maintaining exhaust flow.  A smaller polished oval Magnaflow muffler with offset entrance helps quiet it down even further.  Both mufflers also have a 3"ID, and the section ends with another v-band clamp before the rear subframe.  Vibrant stainless hanger rods were used, and the rear hanger is secured to a Powerflex polyurethane isolator.  The two front isolators are still the stock rubber, which I plan to also change to Powerflex soon.

Tail Pipe
The tail section finishes it off by routing over the rear subframe and exiting at the stock location in the rear diffuser grille.  I decided not to use a polished tip at this time because the rear will eventually be changed to a dual-exit design with a European rear bumper, which is shorter than a US-spec bumper.  I like how the raw pipe looks anyway... very sleeperish.

Future Plans
I do plan to make a few changes in the near future.  The 30" resonator uses a 6" body, which hangs a bit low for my liking.  I have emailed Magnaflow in the hope that they can make the same muffler with a 5" body instead, so we'll see what happens.  Also, as mentioned, the front isolators will soon be changed to polyurethane to help support the weight.

Videos
Here are a couple videos revving the motor and doing some flybys.

Page 1: Current Specs, Mods & Pics
Page 2: Exhaust
Page 3: Maintenance & Mods Timeline
Page 4: Strictly/Focused
Page 5: Stock
Page 6: Quarter Mile Time