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- Camshafts & Valvetrain
- Cylinder Heads
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- Cylinder Head Fasteners (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Lifter Valley Plates (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
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Make/Engine

HUMMER Engines & Components

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On Sale

PRW Cylinder Head Stud Kits

PRW cylinder head stud kits offer heavy-duty fasteners, along with 12-point nuts and washers for Ford Powerstroke engines. These replacement studs are machined from 4135 chromoly steel and finished with a black oxide. They provide superior clamping power, compared to the stock bolts—which will solve the problem of head gasket failure caused by increased cylinder pressure.

5.0 out of 5 stars ( 1 )

$269.96

$229.47

On Sale

Holley LS Valley Covers

Holley LS valley covers are the latest accessories offered for the GM LS engine platform. These covers install between the two banks of cylinder heads, depending on your usage of knock sensors, displacement on demand, and active fuel management. They're available in a cast aluminum finned design to match Holley's popular valve covers, as well as a billet aluminum trussed version for a race-inspired look. The valley pan covers are offered in a variety of finishes.

5.0 out of 5 stars ( 2 )

$226.95

$204.25

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