GT-500 Power Package

The GT 500 arrived here at the shop, the customer wanted to make more power, sound better, and also dress it up a bit.

The first thing we decided was to make the exhaust a bit more efficient by adding Stainless Works long tube headers, 3” x-pipe with 3” axle back. The second thing was to help it breathe by adding the Steeda cold air intake and a custom AMP Performance 2.800” S/C pulley which adds approx. 2 psi. We elected to tune the vehicle using Sniper Tuning software while on our Dynojet 224XLC dyno w/ wideband O2. We also added the Ford Racing “FORD GT” supercar blue valve covers for appearance.

The GT 500 came in to the shop making only 412 rwhp, and after all the hard work the car made a respectable 510 rwhp. 98+ rwhp net gain.

Click on the images below to see a larger version

We fabricated an engine support system to remove the K-member, to allow for more room to access header bolts and ease installation.
A little side by side comparison ... it speaks for itself!
Stainless Works - quality workmanship
Driver's side manifold removed	We remove all the factory studs and run a tap through every bolt hole to ensure good torque on the fastners and to prevent thread failure.
The OEM K-member removed from vehicle	The SW headers are required to use the OEM gaskets. Here we also use high temp silicone to ensure 100% seal.
A glimpse of the amount of room even with large tube headers	Driver's side installed and Stage 8 bolts to keep them from backing out
A glimpse inside the 3" collector	Here we are installing the k-member - note the use of an alignment bar before we tighten the k-member to ensure proper alignment of front suspension.
Getting ready to install rack & pinion	Now that the k-member is installed one of the final thing to do is install the lower ball joint back into the spindle.
Side by side comparison
Note 3" straight thru core	Misc parts , clamps, tips, etc.
Final installation pics - it looks fairly stealthy from the rear view. Almost an OEM look!
For pricing and availability, please call AMP Performance at (602) 437-2727. For technical questions, please call the AMP Performance Dyno and Service Shop at (602) 437-2791.