Originally Posted by PunjabiM3
So you are saying that you got 13 whp from just the muffler? Seems high...
No BS, I'll post the dyno sheet on Monday, If I didn't see it, I wouldn't have believed it myself. We did 5 before pulls( 3 accurate and 2 with spikes) and 5 after pulls(4 accurate and one spiked). The engine made more power on the 3rd run both times, it needs a little temp to get the best result.