★★★★★ 1
Cheap
Cheaply made
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Reviewed in the United States on December 30, 2025
COMP Cams Camshaft CS XR258HR-12
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
COMP Cams Camshaft CS XR258HR-12Hydraulic Roller Xtreme Energy Computer Controlled: For throttle body 305 or 350, very good economy and power.; 258 264 Advertised Duration, 206 212 Duration . 050", . 480" . 488" Lift, 112 Lobe Separation; 1000 to 5000 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump; This Part Fits: Year Make Model Submodel 1987 1991 Avanti II Base 1991 1996 Buick Commercial Chassis Base 1992 1993 Buick Roadmaster Base
Quick Dispatch:
Your COMP Cams Camshaft CS XR258HR-12 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.5 ★★★★★
Based on 1228 reviews
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Product Reviews
★★★★★ 5
Great quality and price
Perfect fit. Received quicker than boat shop
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Reviewed in the United States on June 22, 2025
★★★★★ 5
Easy to install if you watch some online how to videos.
The water pump kit worked great on my 35 year old, 2 stroke, 100hp, Mercury Outboard.
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Reviewed in the United States on May 15, 2025
★★★★★ 4
Very good shipped and received fast
Missing one bottom gasket. Maybe factor made changes from old style
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Reviewed in the United States on July 10, 2021
★★★★★ 5
Good impeller kit
Great kit for impeller alpha one gen two outdrive. The only thing that was missing is the instructions as a reference.
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Reviewed in the United States on August 14, 2025
