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Fully displaced valving tuned for improved compression and extension travel
The XL-R Pro exceeds HID output yet weighs only 2
By using pressed in steel inserts at the main studs
Whether you're in need of replacing the injectors in your LLY Duramax or you'd merely like some additional mileage
Available in 0-15 psi
Cometic MLS Left Side Head Gasket 01-07 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML | .140" ATS-3139202104 Fully displaced valving tuned forBuilt for reliability under stock or high performance conditions, this premium multi layer steel (MLS) head gasket delivers consistent sealing for GM Duramax engines. Designed to maintain proper cylinder pressure and withstand extreme heat and boost, its available for both Left (Driver) and Right (Passenger) side fitment. Choose from multiple thickness options to match your piston protrusion, head resurfacing, or compression ratio needs: . 027"
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