Help is just a click away!
Click here to chat with a Speedway Team Member
Online - Chat with us!
Products to Compare (max of 3)
Compare These Parts
Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Since 1952
Talk to the Experts. Call 800.979.0122
Shop By
Street Race Truck More... The Toolbox
Add to Cart
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B

COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B

0 Reviews | 0 Answered Questions
Out of Stock
More Like This
Select your vehicle to verify fitment.
Select Vehicle
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B
COMP Cams 21-237-4 Magnum Hydraulic Camshaft, Mopar B/B
Zoomed In Image
Part # 282212374
Call to Order
Add to Buildlist
Videos & Articles

Important Messages:

  • This product is discontinued.
  • This item ships directly from the manufacturer. It may take an additional business days for COMP Cams to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
  • This item 282212374 is made to order. It will be shipped from our warehouse when it is produced.



COMP Cams Magnum 280H-10 Hydraulic Camshaft for Big Block Chrysler, Single Bolt.

Magnum Hydraulic Flat Tappet Camshafts. Hydraulic, For 9:1-10:1 Compression, 383 Needs 2500 Stall, 440 Needs 2000+ Stall, Use 700-800 CFM Carburetor, Headers, 3.91+ Gears. All COMP Cams Camshafts are manufactured to the strictest tolerances. Rigorously tested and checked for quality.

  • Great high RPM power
  • Easy on valve train parts
  • Can be used with mild ratio rocker arms & traditional performance valve springs
  • Best with aftermarket converter & 9.5:1+ compression


1959-78 Chrysler 383-440
1960-78 Plymouth 383-440
1959-79 Dodge 383-440
Some parts are not legal for use in California or other states with similar laws/regulations

Related Products

More Like This


Q & A

Videos & Articles
  • What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
  • Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!
  • Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century.
  • Tired of pulling your breather to pour oil in your system? We've got you covered.
  • Picking a proper camshaft for your project can rapidly deteriorate into chaos. So many possibilities. Want a little advice? Click here!
  • One of the most important parts of your racing operation is the engine. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. Also learn some tips to prolong the life of your engine.
  • Picking the right camshaft can be a challenge. Use our camshaft selection guide to learn how to select the right cam for your street rod's best performance.

You May Also Like