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Customer q:

Hi, I'm considering the comp cam # 51-221-4 for my '65 GTO 389. I need good vacuum for the power brakes and also looking for strong low end torque. Car is an auto. Thanks


engine = 389

make = Pontiac

model = GTO

trans = auto

year = 1965


Yes, that cam is within your design parameters for the build of your GTO. You'll need to check piston to valve clearance and either back off the timing or may have to run premium fuel with an octane booster. If you have any additional questions, we are here 24/7. Tahnk you for choosing JEGS and have a great day.

COMP Cams 51-221-4
‍Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Only Lift .447"/.455" Duration 256°/368° RPM Range 1000-5200

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auto car parts help
Posted on
March 26, 2018

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