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COMP Cams Nitrided Camshaft CB XS274 S

SKU: CCA11-677-20

Camshafts

CCA Camshafts...

COMP Cams Nitrided Camshaft CB XS274 S

SKU: CCA11-677-20

Camshafts

CCA Camshafts...

A$923.84
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

XE NIT 236/242SFTBBC

Xtreme Energy NIT 236/242 Solid Flat Cam for Chevy Big Block 396-454 (Nitrided). Very strong mid-range torque and throttle response. 2500+ stall.

Additional Information

Very strong mid-range torque and throttle response, 2500+ stall. Nitrided.

Application Summary

Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

Part Type

Engine Camshaft

Product Overview

*Xtreme Energy Camshafts*
• Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
• More vacuum allows an increase in duration for improved performance and assists power brakes
• Excellent performance in street carbureted applications
• Best performance with aftermarket intake manifolds, headers, lower gear ratios, etc.

Additional Application Notes
• w/ S Engine VIN; Hyd. Flat Tappet; 2000-6400rpm; Adv. Dur. 274 Int./280 Exh.; V. Lift .568 Int./.578 Exh.; Lobe Angle 110 deg.;
• w/ S Engine VIN;
• Hyd. Flat Tappet; 2000-6400rpm; Adv. Dur. 274 Int./280 Exh.; V. Lift .568 Int./.578 Exh.; Lobe Angle 110 deg.;

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-07 21:25:48

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Advertised Exhaust Duration:280
Advertised Intake Duration:274
Amazon ASIN:B002EE0DGQ
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,000-6,400
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?:Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?:Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?:No
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?:Yes, but must be a race/competition only vehicle.
Cam Type:Solid Flat Tappet
Camshaft Gear Attachment:3-Bolt
Camshaft Material:Nitrided Cast Iron
Camshaft Series:Xtreme Energy
Description:Xtreme Energy NIT 236/242 Solid Flat Cam for Chevrolet Big Block 396-454
Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Exhaust Duration @ .050 in.:242
Exhaust Duration at .050 inch Lift:242
Exhaust Duration:280
Exhaust Valve Lift(in):0.578
Exhaust Valve Lift:0.578
Grind Number:XS274S
Intake Duration @ .050 in.:236
Intake Duration at .050 Inch Lift:236
Intake Duration:274
Intake Valve Lift(in):0.568
Intake Valve Lift:0.568
Lifter Type:Solid Flat Tappet
Lifters Included:No
Part Number:cca11-677-20
RPM Range:2000-7000
Title:Xtreme Energy NIT 236/242 Solid Flat Cam for Chevrolet Big Block 396-454
Usage:Street/Strip
Valve Springs Required:Yes

Product Downloads

# Document Type Download
1. Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 19:00:24

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Comp Cams, Comp Cams (edelbrock)
StreetFX SKU cca11-677-20
SFX Item ID 4118498
Accounting SKU cca-11-677-20
Manufacturer SKU 11-677-20
Manufacturer UPC 036584177876
Alternative References 11-677-20, CCA-11-677-20

Camshaft, Mechanical Flat Tappet, Advertised Duration 274/280, Lift .568/.578, Chevy, Big Block, Each

An excellent performing cam in street carbureted applications, just got more extreme! COMP Cams Xtreme Energy Pro-Plasma Nitrided camshafts give you the benefits of their best-selling cam with extreme durability. Pro-Plasma nitriding gives these cams increased hardness for improved initial and long-term wear characteristics. The race-proven process is the best way to increase the durability and lubricity of flat tappet camshafts. Don't be blinded by the bling of other shiny cams--choose COMP Cams Xtreme Energy Pro-Plasma nitrided camshafts.

Product Attributes
BrandCOMP Cams
Manufacturer's Part Number11-677-20
Part TypeCamshafts
Product LineCOMP Cams Xtreme Energy Pro-Plasma Nitrided Camshafts
UPC036584177876
Cam StyleSolid flat tappet
Camshaft UseStreet/Strip
Camshaft Manufacturers DescriptionVery strong mid-range torque and throttle response, 2500+ stall.
Basic Operating RPM Range2,000-6,400
Intake Duration at 050 inch Lift236
Exhaust Duration at 050 inch Lift242
Duration at 050 inch Lift236 int./242 exh.
Advertised Intake Duration274
Advertised Exhaust Duration280
Advertised Duration274 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.568 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.578 in.
Valve Lift with Factory Rocker Arm Ratio0.568 int./0.578 exh.
Camshaft Gear Attachment3-bolt
Intake Valve Lash0.016 in.
Exhaust Valve Lash0.016 in.
RemanufacturedNo
Computer-Controlled CompatibleNo
Grind NumberXS274S
Valve Springs RequiredYes
QuantitySold individually.

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