The opposite since it has decreased rod angularity. 570whp but how much torque or did you mean 570 ft lbs? For the record my sig was an 8900rpm LR2.4 and ran 32-34psi on the street making between 715-750whp and 570 ft lbs. I have often said I have the golden goose car, but I ripped on it once a day like that for 15,000 miles.

 

Thats the Pro H though. For the cost I think the R&R I beam is really close.

 

570 is only an estimate, the ef4 i had made 550 on lower boost, the ef3 made both more power and torque but i never did do a run with it. I have found a few manley failures and they all seem around the time I bought/built my motor, could be a few bad rods in there. I have no doubt most of the manleys hold up, it's like you get stock evos that can run 10's on stock rods and then some give up the ghost stock power.