In recent years, exhaust system technology has come a long way, and SpinTech is at the forefront of design. After freeing up the intake side of Flashback F-150's new 400 C.I. motor, we were still faced with a rather restrictive single exhaust. Let's face it. After that, it's all down hill.
Temps rise, power dies, and fuel economy drops through the floor.
All of which suck, Bevis. The solution sounds simple - Convert your vehicle to either a dual exhaust setup, or a big single system. Now here's the catch. You'll now have several MORE things to consider in order to create an exhaust system properly matched to your rig. Realistic RPM range of operation.