07-14-2008, 12:45 AM

Don66GTO

Junior Member

Join Date: Jan 2008

Location: Central TX

Posts: 11

389 question...

I was wondering what the differences were between the YS and the YR or WG engines are other than the HP rating.

I understand that some of the engine codes are different due to the type of transmission the car came with I was just wondering what the factor was that made them have different HP ratings... I was it the heads and cam?

If anyone knows I would appreciate the help. Thanks!!

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