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Howards Cams 120255-12 Hydraulic Roller Camshaft Big Block Chevy 284/288 Duration

Manufacturer

Picture for manufacturer Howards Cams

Part Number

120255-12
9 reviews
Sale Price

$415.98

3 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Howards Cams 120255-12 is a hydraulic roller camshaft engineered specifically for big block Chevrolet engines. This performance camshaft delivers an aggressive profile designed to enhance mid-range to upper RPM power output while maintaining street-friendly drivability with hydraulic roller tappet compatibility.

Camshaft Specifications:

  • Advertised Duration: 284° intake / 288° exhaust
  • Valve Lift: .578" intake / .618" exhaust
  • Camshaft Type: Hydraulic roller tappet design
  • Application: Big block Chevrolet engines
  • Configuration: Single camshaft

This camshaft profile provides excellent throttle response and power gains throughout the RPM range. The hydraulic roller design reduces friction and wear compared to flat tappet camshafts while eliminating the need for break-in procedures. The asymmetric duration and lift specifications are optimized to maximize exhaust scavenging and cylinder filling efficiency. Ideal for street performance, hot street, and bracket racing applications where reliable power and durability are essential.

Products specifications

Advertised Duration

284 int./288 exh.

Advertised Exhaust Duration

288

Advertised Intake Duration

284

Basic Operating RPM Range

2,400-6,000

Cam Style

Hydraulic roller tappet

Camshaft Manufacturers Description

Fair idle, performance usage. Great midrange torque and power.

Duration at 050 inch Lift

231 int./235 exh.

Exhaust Duration at 050 inch Lift

235

Exhaust Valve Lift with Factory Rocker Arm Ratio

0.618 in.

Intake Duration at 050 inch Lift

231

Intake Valve Lift with Factory Rocker Arm Ratio

0.578 in.

Lobe Separation (degrees)

112

Notes

Retrofit roller cam for engines that did not originally come with a roller cam.

Quantity

Sold individually.

Valve Lift with Factory Rocker Arm Ratio

0.578 int./0.618 exh.

Fast! Fast, fast, Fast! Fast, fastFast! Fast, fast

Overall quick shipping and nothing was missing or broken!<br>A little tricky install but fast with some help.<br>I like the fact that they have competitive pricing and there site is nice and secure.

Autoplicity had the best price on the part I needed and was in stock. Easy ordering process and good correspondence.

Very good price. Super quick delivery. Will def. buy from them again. Highley recomend them

fast shipping and great prices

Great price, very helpful tech support,thanks will buy again<br><br> Chris

Received my product today was happy with the item purchased and will buy again from Autoplicity. Was received in a timely manner and like described

Helpful-reasonable prices-reasonable shipping-prompt.

Fast -regular- shipping even on large items. I was skeptical at first but I am happy and don't regret my purchase!!!

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