[Jeff Frigo]

Originally Posted by RICK LAKE

HOLY PIG SH!T. What a fish story this one is, The only thing I found about this story is the pressure readings that all motors want and need back pressure to product the best power. 1.4-2.5hg is the idea area for the best of both. A 500 cubic inch motor is going to have a higher numbers than a 427 motor. There have been test done years ago with mufflers and high flow mufflers. Over all you will gain about20-40ft of torque, 35-40 HP with a BB motor at 6,500 rpm. The choice is noise. I have street pipes and race pipes. Streets are quiet. On some tracks you are allow only 98-103 decibels. Back pressure 5.8hg at 6,000 rpms
My race pipes are in the 110-115db range. back pressure at 6,000 rpms 2.7hg at 6,000 rpms. Power different is there. If you can fit 2.5" dual exhaust under the car and out the back you will have the best of both worlds. Oval pipe helps with ground clearance. Have not seen alot of info on good or bad with this. Nascar runs them.
How with these magic pipes I can go to 720ft of tork and 640 RWHP with a 482 and 10.5 compression.WOW. Should buy 2 sets for when they wear out the first set. I heard a story about a guy called Jack and magic----- sorry different fairy tale. I too would like to see real life testing. Bet the 1/4 mile racer would like another 100HP in there cars. They would be running low 8.0's. That enough. Rick L.

Rick, my man.