COMP Cams Camshaft LT1 XR258HR-12

Marsoni

M251S

$215.72

Get it in 3 business days with 1 day shipping. Friday, May 29

COMP Cams Camshaft LT1 XR258HR-12Pontiac: Firebird 92 97 5. 7 L Engine, Buick: Roadmaster 94 96 5. 7 L Engine, Cadillac: Commercial Chassis 94 96 5. 7 L Engine, Cadillac: Fleetwood 94 96 5. 7 L Engine, Chevrolet: Caprice 94 96 5. 7 L Engine, Chevrolet: Commercial Chassis 94 94 5. 7 L Engine, Chevrolet: Impala 94 96 5. 7 L Engine, Buick: Commercial Chassis 94 96 5. 7 L Engine, Chevrolet: Corvette 92 96 5. 7 L Engine, Chevrolet: Camaro 92 97 5. 7 L Engine, Excalibur: Limited 93 93 5. 7

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Note: there are no English instructions. I wanted this cleaning agent to disperse throughout the nooks and crannies of the engine, so about ten minutes before arriving at the mechanic's shop for my oil change appointment, I pulled the car over and poured this into the engine, then drove it the rest of the way there. The mechanic reported lots of sludge drained out with the oil. The engine seems to perform and sound better, as if it's not working as hard.

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Reviewed in the United States on February 15, 2026