1killercoupe

I have a 1988 speed density coupe. I have a upr pro series rear suspension on the car with a stock 5.0 under the hood. The car has bbk shorty headers with a bbk off road h-pipe and flowmaster cat back american thunder system. The tailpipes had to be taken off because they didn't clear the antiroll bar. So now the car has turndowns off the muffler. Does anyone know if im losing power with no tailpipes on a stock speed density motor?

Venomantidote95

no, torque maybe but i doubt it! my 87 has them but turned to the side to reduce in car backwash!

holyshift

A pro series suspension in an all stock car.......Iam thinking money could have been spent else were first but to answer your question Iam sure your fine,my turn downs are also turned slightly outward.