BMW Internal Engine Parts for BMW Z Series E85/6 (2003-2008)

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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Elring Cylinder Head Bolt Set
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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Elring - Corporate Logo
T#:377135
Part#: 11127548799
In Stock
$ 29.99

This product was last offered at the strikethrough price on
07-01-2026

$ 27.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 29.99

This product was last offered at the strikethrough price on
07-01-2026

$ 27.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Head bolts are one time use, and under no circumstance should be reused. Head bolts stretch when torqued, and do not return to a non-stretched state.
Cat Cams Camshaft Set - 288/280 12.75mm/12.50mm Lift - E46 M3 With R...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Cat Cams - Corporate Logo
T#:4414885
Part#: 1301805KIT
In Stock
$ 4,372.99 USD
Free Shipping
$ 4,372.99 USD
Free Shipping
Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is. The included rocker arm kit consist of: - 24x "CAT031" rocker arm, steel billet, coated - 1x oil connector bridge - rocker arms with 0.5mm oil jet hole towards the cam/follower contact area - rocker arm shafts need to be drilled at each rocker arm (in the groove already present) - rocker arm shafts need to be drilled at oil bridge connector (no need to make extra groove, connector has internal groove) - intake rocker arm shaft needs front plug to close - intake rocker arm shaft has no oil feed so an oil bridge is required to connect the intake/exhaust rocker arm shafts *Please note that the factory cams ave a pressure regulator valve that needs to be removed and installed in the new cams*
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