With the BMW 440i Gran Coupe Rocker Shaft Spring Kit, you get a valvetrain that is locked in sync. This secures each and every rocker arm so that valve events stay sharp and power remains on tap. This Rocker Shaft Spring Kit comes highly recommended. Steady clamp force mimics factory valve spring pressure so that clearance creep won't cause misfire or valve float. Its dual contact layout has been fitted to later 440i Gran Coupe editions. So it loads across a wider rocker face which lengthens life on spirited drives or long commutes. The earlier builds of the 440i Gran Coupe remain fully compatible through the simple single rate spring choice sent within the same Rocker Shaft Spring Kit. Following heat soak and wear, the kit allows the turbocharged inline six to maintain full compression and smooth idle which aids in quicker throttle response and stronger highway pulls. Safety also benefits from the Rocker Shaft Spring Kit which stops the pounding that could bend pushrods or crack rocker arms, keeping important parts intact at high rpm. The installation in the overhead cam housing keeps original BMW gasket lines and torque specs without further modification. The owners of a 440i Gran Coupe appreciated the fact that each Rocker Shaft Spring Kit was engineered to work with all 440i Gran Coupe trims. These include rear drive and xDrive, coupe and gran design. Out of all the modern engine valvetrain upgrades, this Rocker Shaft Spring Kit stands out for its reliability and factory level fit. Furthermore, it allows the BMW 440i Gran Coupe to achieve better everyday versatility. All BMW enthusiasts can see how the Rocker Shaft Spring Kit pairs with any 440i Gran Coupe tune, keeping BMW feel and firm BMW confidence.
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