What is the difference between delta performance level 2 , 3 , 3.5 and now a 4???? I blew up my hdr 37 efi w 3.5 on it. It locked up [POUTING FACE] with only 22 hours on it [FLUSHED FACE]


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(337) 907-6375

Probably a good way to find out.

and how'd you "blow it up"?

From my recollection the main differences are:
Lvl 2- heads, exhaust and tune;
Lvl 3- heads, exhaust, tune and cam;
Lvl 3.5- heads, exhaust, tune, cam and pistons;
Lvl 4- heads, exhaust, tune, cam, pistons and roller rockers;