COMP Cams Camshaft CS 266H-R14

Marsoni

M251S

$215.72

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

COMP Cams Camshaft CS 266H-R14Hydraulic Roller Computer Controlled: Great mid range power with modified TPI application. Requires custom tuning.; 266 276 Advertised Duration, 210 220 Duration . 050", . 500" . 510" Lift, 114 Lobe Separation; 1400 to 5400 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump; Catalog Warranty User 1 Catalog This Part Fits: Year Make Model Submodel 1987 1991 Avanti II Base 1991 1996 Buick Commercial Chassis

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Didn't really believe the hype. Did a little research and watched Project Farm and decided to try. Im not a snake oil guy....but I will say my 2013 common rail TDI is quieter and I get a tad more fuel mileage. Does it pay for itself? Well, it does get better mpg, but I feel the reduction in noise most likely relates to less wear and tear and thats good enough for me. Im only using 1oz per fill up (about 14 gallons) so it lasts a very long time. I get 40mpg and im not light footed.

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Reviewed in the United States on April 2, 2026

Verified Purchase

James Jay

Chelsea, US

★★★★★ 5

It's a spark plug

What i needwd

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Reviewed in the United States on May 27, 2026

Verified Purchase

Dallas, US