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Customer q:

I have a stock 2000 GMC Sierra 5.3L. What kind of heads can I put on there that will run good and add horsepower? And how much of a horsepower gain will there be? Thanks.


ac = Yes

drivewheel = 2WD

engine = 5.3

fuel = Efi

make = Gmc

model = Sierra

pwrbrk = Yes

pwrstr = Yes

trans = Automatic

year = 2000


Thank you for giving JEGS the opportunity to assist you with your technical question. 243 heads are the best upgrades for a 5.3 as a bolt on budget head. If you want something we sell, you can look at the small bore LSX heads. 

Chevrolet Performance LSX-L92 Small Bore Cylinder Head
‍Chevrolet Performance LSX-L92 Small Bore Cylinder Head

As far as added horsepower, you will get a lot. Those heads on an all stock setup which will make 40-60 more hp and with a mild cam, they will pick up too 100hp with no other changes. If you need any additional help, please reach out to us 24/7.

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auto car parts help
Posted on
March 26, 2018

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