COMP Cams Camshaft Kit CB XR258H-R10

Marsoni

M251S

$850.90

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

COMP Cams Camshaft Kit CB XR258H-R10K KIT Complete Kit Includes: Camshaft, Lifters, Valve Springs, Retainers, Valve Locks, Valve Stem Seals, Timing Chain Set, Assembly Lube (in flat tappet applications), Decals and Instructions. Catalog User 1 This Part Fits: Year Make Model Submodel 1967 1975 Chevrolet Bel Air Base 1967 1972 Chevrolet Biscayne Base 1973 1974 Chevrolet Blazer Base 1969 1972 Chevrolet Brookwood Base 1978 1980 Chevrolet C10 Big Ten 1975 1980 Chevrolet C10 Cheyenne 1975

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Still not sure about how this magnesium affects me. I have only been taking one tablet an hour or two before bedtime. Seems like sometimes I can’t go to sleep after taking it, charges up my brain. Other times I sleep but have crazy dreams. Maybe it works for some, but not others. I’ll try to finish the bottle, but the lack of sleep after taking the Magnesium L-Threonate makes me hesitant to continue some nights. That’s mainly the reason I purchased this brand to include the reviews.

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Reviewed in the United States on February 12, 2026