My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Howards Cams 121133-14 Steel Billet Mechanical Roller Camshaft Big Block Chevy

Manufacturer

Picture for manufacturer Howards Cams

Part Number

121133-14
6 reviews
Sale Price

$444.98

2 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Howards Cams 121133-14 is a high-grade steel billet mechanical roller camshaft precision-ground for race-quality performance. This solid roller camshaft is designed for Big Block Chevy 396-502 (Mark IV) engines from 1965-1996 and is engineered for pro street/strip applications with a fair idle.

Key Specifications:

  • Duration at .050 inch lift: 261° intake / 269° exhaust
  • Advertised duration: 293° intake / 301° exhaust
  • Valve lift with factory rocker ratio: 0.680 inch intake / 0.680 inch exhaust
  • Lobe separation angle: 114 degrees
  • Centerline: 110 degrees
  • Operating RPM range: 3,400-7,500
  • Valve lash: 0.022 inch intake / 0.022 inch exhaust
  • Camshaft gear attachment: 3-bolt

Recommended Setup:

  • 9.0:1 or higher compression ratio recommended
  • Blower or supercharger application
  • Multiple carburetors suggested
  • 3500+ RPM stall speed torque converter recommended

Mechanical roller camshafts deliver aggressive power for all-out competition. This solid roller retrofit-style camshaft is ideal for street/strip use and makes an excellent blower cam. Each camshaft is sold individually and manufactured to exacting tolerances for consistent, reliable performance.

Products specifications

Advertised Duration

300 int./310 exh.

Advertised Exhaust Duration

310

Advertised Intake Duration

300

Basic Operating RPM Range

3,200-7,200

Cam Style

Mechanical roller tappet

Camshaft Manufacturers Description

Pro Street, great blower cam. Multiple carburetors suggested.

Duration at 050 inch Lift

260 int./270 exh.

Exhaust Duration at 050 inch Lift

270

Exhaust Valve Lash

0.025 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio

0.680 in.

Intake Duration at 050 inch Lift

260

Intake Valve Lash

0.025 in.

Intake Valve Lift with Factory Rocker Arm Ratio

0.680 in.

Lobe Separation (degrees)

114

Quantity

Sold individually.

Valve Lift with Factory Rocker Arm Ratio

0.680 int./0.680 exh. lift

Very fast shipping, received it Monday when I ordered it on Thursday. Thanks!

Good price for item

best price online. fast shipping and wright part. I recommend this site to anyone!

FIRST TIME BUYER SEEMS OK / RECEIVED PRODUCT A OK !!!!

Happy with the purchase! The lowest price and fast shipment.

Best price online for an Injen intake. Arrived in a week. Appreciated the "Item shipped" email with tracking number!

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy