Description
Exclusive Comp Cams flash sale discount at StreetFX!
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LSR 239/255 HRlrLS
Hydraulic Roller: Broad top end power range for high rpm, Race only LS engines with aftermarket rectangular port cylinder heads and higher compression.
Additional Information
Broad top end power range for high RPM, race only LS engines with aftermarket rectangular port heads and higher compression.
Application Summary
Fits 4.8, 5.3, 5.7, 6.0, 6.2 and 7.0 Liter LS1, LS2, LS3, LS4, LS6, LS7 plus SUV and Truck Engines (Grinds are specific to displacement and cylinder head design)
Part Type
Engine Camshaft
Product Overview
*LSR Camshafts*
⢠Take advantage of today's newer and better flowing aftermarket cylinder heads
⢠Feature higher exhaust duration and overall lift to provide broadest powerband and most top end power of any COMP Cams LS camshaft
⢠Unique grinds for both cathedral & rectangle port heads
⢠Require 26926-16 high pressure valve springs
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: | 305 |
| Advertised Intake Duration: | 289 |
| Amazon ASIN: | B001P1Z990 |
| Assembly Lubricant Included: | No |
| Basic Operating RPM Range: | 2,400-7,200 |
| 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: | Hydraulic Roller |
| Camshaft Gear Attachment: | 3-Bolt |
| Camshaft Material: | Billet Steel |
| Camshaft Series: | LSR Rectangular Port All Out Power |
| Description: | LSR Rectangular Port 239/255 Hydraulic Roller Cam for GM LS GEN III/IV |
| Engine Family: | GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015) |
| Exhaust Duration @ .050 in.: | 255 |
| Exhaust Duration at .050 inch Lift: | 255 |
| Exhaust Duration: | 305 |
| Exhaust Valve Lift(in): | 0.624 |
| Exhaust Valve Lift: | 0.624 |
| Grind Number: | 289LRR HR14 |
| Intake Duration @ .050 in.: | 239 |
| Intake Duration at .050 Inch Lift: | 239 |
| Intake Duration: | 289 |
| Intake Valve Lift(in): | 0.624 |
| Intake Valve Lift: | 0.624 |
| Lifter Type: | Hydraulic Roller |
| Lifters Included: | No |
| MSE Process Video Link: | https://www.youtube.com/watch?v=hTyIQxrPCCI |
| Part Number: | cca54-471-11 |
| RPM Range: | 2400-7200 |
| Title: | LSR Rectangular Port 239/255 Hydraulic Roller Cam for GM LS GEN III/IV |
| Usage: | Street/Performance |
| 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.
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Comp Cams, Comp Cams (edelbrock) |
| StreetFX SKU | cca54-471-11 |
| SFX Item ID | 4120681 |
| Accounting SKU | cca-54-471-11 |
| Manufacturer SKU | 54-471-11 |
| Manufacturer UPC | 036584195337 |
| Alternative References | 54-471-11, CCA-54-471-11 |
Camshaft; LS Camshaft; Hyd. Roller; 2400-7200rpm; Adv. Dur. 289 Int./305 Exh.; Valve Lift .624 Int./.624 Exh.
COMP Cams LSR Series hydraulic roller camshafts feature modern lobe profiles that take full advantage of high-flowing late model GM LS3 rectangular port cylinder heads. They are tailored for a specific rpm range and usage, from torque to high-rpm horsepower. Give your Chevy LS3 engine a shot in the arm with one of these COMP Cams LSR Series hydraulic roller camshafts.
| Product Attributes | |
|---|---|
| Brand | COMP Cams |
| Manufacturer's Part Number | 54-471-11 |
| Part Type | Camshafts |
| Product Line | COMP Cams LSR Series Hydraulic Roller Camshafts |
| UPC | 036584195337 |
| Cam Style | Hydraulic roller, OE roller |
| Camshaft Use | Racing |
| Basic Operating RPM Range | 2,400-7,200 |
| Intake Duration at 050 inch Lift | 239 |
| Exhaust Duration at 050 inch Lift | 255 |
| Duration at 050 inch Lift | 239 int./255 exh. |
| Advertised Intake Duration | 289 |
| Advertised Exhaust Duration | 305 |
| Advertised Duration | 289 int./305 exh. |
| Intake Valve Lift with Factory Rocker Arm Ratio | 0.624 in. |
| Exhaust Valve Lift with Factory Rocker Arm Ratio | 0.624 in. |
| Valve Lift with Factory Rocker Arm Ratio | 0.624 int./0.624 exh. |
| Camshaft Gear Attachment | 3-bolt |
| Remanufactured | No |
| Computer-Controlled Compatible | Yes |
| Grind Number | 289LRR HR14 |
| Valve Springs Required | Yes |
| Quantity | Sold individually. |
| Notes | Cannot use stock springs. With rectangular port heads. Custom computer tuning required. |
Compatibility
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