OPGI.com works best with JavaScript enabled.
1‑800‑243‑8355

As seen on

  • Lokar Car Show Series Logo
  • All Girls Garage Logo

Comp Cams

Camshaft, Comp Cams Thumpr, Mutha Thumpr, SBC, Retro Hyd Roller

Free Shipping!
Part# : CC26018
Mfg#: 12-601-8
Sold As: Each
Ship Size: Standard
$578.99
List Price: $637.95
You Save $58.96

Calendar IconArriving Soon
Fits 1964–1987 El Camino View fitment for 7 models
Add To Wishlist 

Small Block Chevrolet 262-400 Mutha Thumpr Hydraulic roller Camshaft by COMP Cams®

Mutha Thumpr hydraulic roller grind targets 2200-5900 RPM with documented lift and duration specs

This Mutha Thumpr hydraulic roller camshaft is designed for Small Block Chevrolet 262-400. Valve lift is .521/.507 inch, advertised duration is 291/311 degrees, duration at .050-inch lift is 235/249 degrees, lobe separation is 107 degrees, and the documented operating range is 2200-5900 RPM. High-performance street/strip; rough idle; 9:1 compression and 2500+ stall recommended.

• Small Block Chevrolet 262-400 application • Mutha Thumpr hydraulic roller design • Valve lift: .521/.507 inch • Duration @ .050: 235/249 degrees • 107-degree lobe separation • Camshaft sold individually

Notes

  • APPLICATION FOOTNOTES: [7] Stock springs cannot be used. [10] Requires thrust button & wear plate. [46] Must use bronze tip fuel pump push rod when using high pressure or high volume pump.
  • This item is not eligible for any further discounts or promotional pricing.
3
This product is not legal for street use on an emissions-controlled vehicle. It may be used on dedicated competition or pre-pollution-controlled vehicles only. Learn More
We aim to provide accurate and complete product information. If you notice anything incorrect, missing, or unclear, please let us know.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1964–1977 Chevrolet Chevelle Small-Block - Retro-fit hydraulic roller [7, 10, 46]
1964–1987 Chevrolet El Camino 1964–1977: Small-Block - Retro-fit hydraulic roller [7, 10, 46]
1978–1987: Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
1978–1983 Chevrolet Malibu Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
1970–1988 Chevrolet Monte Carlo 1970–1977: Small-Block - Retro-fit hydraulic roller [7, 10, 46]
1978–1988: Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
1978–1988 Oldsmobile Cutlass Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
1982–1986 Pontiac Bonneville Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
1978–1987 Pontiac Grand Prix Camshaft Only - Retro-fit hydraulic roller [7, 10, 46]
  • Headshot of OPGI Employee
    Need help finding the right GM restoration parts? Contact a GM Parts Specialist
    Chat Unknown Status Call Toll-Free
    Mon–Fri 8:00–4:30 PT
    Sat 10:00–3:00 PT
     GM Parts Specialist Offline
  • Price Match Guarantee Great parts. Competitive prices. Guaranteed.
  • GM Restoration Experts Since 1982 Over four decades dedicated to GM restoration
  • Original GM Is Our Standard Original GM parts and factory references guide every reproduction
  • A Deeper GM Selection Thousands of restoration, performance, and replacement parts

Customers Who Viewed This Item Also Viewed

Reviews (0)

UH OH! Product reviews didn't load.
Please reload the page, or unblock our review partner Yotpo.com.
Camshaft, Comp Cams Thumpr, Mutha Thumpr, SBC, Retro Hyd Roller
Comp Cams Camshaft, Comp Cams Thumpr, Mutha Thumpr, SBC, Retro Hyd Roller