Originally Posted by ZIPPY
Originally Posted by INTMD8
I used these on my twin turbo LT1. Decent but MLS is far superior. (I would never use the felpros again)


I ended up with some leakage (combustion gases not coolant) after a standing mile run at the 900hp level. Would not be an issue with MLS


That's impressive!

Did they chew up the head noticeably?


No there was no damage. I didn't even know there was a problem until the next time I tore it down for a rebuild. Still made the 1000 mile drive home.

69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700