Originally Posted by
pballer2777
i'm using a nontuned grp 21 in my truck. the motor seems kinda flat. i recently put a new clutch on it but all i had was the stock alum and composite shoes with gold and green springs. i kow that the truck came with all alum shoes. could the composite shoes cause it to feel like it doesn't have that normal snap?
I have run modded GRP's tuned and non tuned and they all lack torque. You can help this by going to silver springs, but you will eat clutches. Put a 053 pipe and a long header that helps too. Or try a high torque pipe and long header. Thats all I got. The GRP's are always lacking in the torque department.