Emissions Warning
Products sold on this website may not be legal for use on public roads or highways due to Environmental Protection Agency (EPA) restrictions or California Air Resources Board (CARB) emissions regulations. Federal and State regulations may restrict Product installation to pre-emissions regulation (Model Year 1974 or earlier) or to competition/racing vehicles used exclusively in
1) events organized by recognized bodies, authorizing permits for participating drivers.
2) racing event qualification, and3) practice associated with events.
Installation of such products, including driving racing vehicles to and from the track, may be considered illegal “tampering ” or as “defeat device”, and may result in federal and state penalties. It is the purchaser’s responsibility to ensure compliance with all applicable emissions laws, including California’s stricter standards.
Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Cam Style:
- Mechanical roller tappet
- Basic Operating RPM Range:
- 2,500-6,500
- Intake Duration at .050 inch Lift:
- 242
- Exhaust Duration at .050 inch Lift:
- 248
- Duration at .050 inch Lift:
- 242 int./248 exh.
- Advertised Intake Duration:
- 28
- Advertised Exhaust Duration:
- 286
- Advertised Duration:
- 280 int./286 exh.
- Intake Valve Lift with Factory Rocker Arm Ratio:
- 0.570 in.
- Exhaust Valve Lift with Factory Rocker Arm Ratio:
- 0.576 in.
- Valve Lift with Factory Rocker Arm Ratio:
- 0.570 int./0.576 exh.
- Lobe Separation (degrees):
- 110
- Computer-Controlled Compatible:
- Yes
- Material:
- Billet Steel
- Camshaft Gear Attachment:
- 3-bolt
- Valve Springs Required:
- Yes
- Grind Number:
- XR280R
- Camshaft Manufacturers Description:
- Mechanical Roller - Xtreme Energy: Best in street machines with 2800+ stall, 10:1+ compression with 3.73-3.90 rear gears.
- Quantity:
- Sold individually.
- Notes:
- Retro-fit: Designed for early non-roller blocks. Requires thrust button and wear plate.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen I
- Engine Sizes:
- 4.3L/262-6.6L/400
- Years:
- 1958-1998
