What kind of torque converter and rear gear ratio should I use with this camshaft?

For optimal performance, COMP Cams recommends a torque converter with at least a 2000 RPM stall speed for 440 engines, and 2200+ RPM for 383 engines. A rear gear ratio between 3.55 and 4.10 is also suggested for this camshaft.

Does this camshaft require special lifters or valve springs?

This is a retro-fit hydraulic roller camshaft, meaning it's designed to work with your existing B/RB block and typically uses hydraulic roller lifters. You will need to ensure you have compatible valve springs and retainers for the lift specifications of this cam.

What is the compression ratio recommended for this camshaft?

This camshaft is best suited for engines with a compression ratio of approximately 9:1. This ratio helps to achieve a good balance of power and drivability for high-performance street use.

COMP Cams XR274HR-10 Hydraulic Roller Camshaft 23-710-9

Name: COMP Cams Camshaft CRB3 XR274HR-10
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-crb3-xr274hr-10-t14-4391257
Price: 606.05 USD
Availability: BackOrder

COMP Cams Camshaft CRB3 XR274HR-10

$606.05

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams XR274HR-10 Retro-Fit Hydraulic Roller Camshaft for Chrysler 383-440. Designed for high-performance street builds.

Key Features

Fits Chrysler B/RB 383, 400, 413, 426 Wedge, and 440 engines with a 3-bolt camshaft design.
Xtreme Energy Retro-Fit Hydraulic Roller design for improved performance and efficiency.
Intake duration of 224 degrees at .050-inch lift.
Exhaust duration of 230 degrees at .050-inch lift.
Intake lift of .544 inches.
Exhaust lift of .561 inches.

This camshaft fits Chrysler B/RB 383, 400, 413, 426 Wedge, and 440 engines. It is not CARB approved and cannot ship to California.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Product Details

If you're looking to build a high-performance street engine for your Chrysler B or RB big-block, a camshaft upgrade is one of the most impactful changes you can make. This COMP Cams XR274HR-10 Xtreme Energy Retro-Fit Hydraulic Roller Camshaft is designed to wake up your 383, 400, 413, 426 Wedge, or 440 engine, giving it a noticeable boost in power and a more aggressive idle note.

This camshaft features a 224-degree intake duration and 230-degree exhaust duration at .050-inch lift, with .544-inch intake and .561-inch exhaust lift. It's a hydraulic roller design, which means less friction and more efficient operation compared to flat tappet cams, and it's a retro-fit, so it's designed to work with your existing B/RB block without needing special lifters. For best results, COMP Cams recommends this cam for builds with around 9:1 compression, a 2000+ RPM stall torque converter (2200+ for 383s), and a 3.55 to 4.10 gear ratio. This setup is ideal for a high-performance street application where you want strong powerband without sacrificing too much drivability.

When installing this camshaft, remember that it uses a 3-bolt camshaft design. You'll want to ensure you have the correct timing set and potentially a new timing chain and gears to go with it. Because this is a performance camshaft, it's not CARB approved and cannot be shipped to California. This is a solid option for anyone looking to get more out of their classic Mopar big-block.