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Comp Cams Part Number 54-470-11 is an LSR Rectangular Port 235/251 hydraulic roller camshaft engineered for GM LS Gen III/IV 3-bolt engines (1997–2015) equipped with rectangular-port cylinder heads. Designed for all-out power, this cam delivers very strong mid-range performance and exceptional top-end horsepower. Ideal for aggressive street/strip and high-performance LS builds seeking maximum airflow and RPM capability.
LSR Rectangular Port All-Out Power series
Extremely strong mid- to high-RPM power curve
Designed specifically for LS rectangular-port engines
High-lift lobe design for increased airflow and efficiency
Wide operating range from 2,200–7,200 RPM
3-bolt camshaft gear attachment
| Specification | Value |
|---|---|
| Camshaft Type | Hydraulic Roller |
| Series | LSR Rectangular Port All Out Power |
| Engine Family | GM LS Gen III/IV (1997–2015) |
| RPM Range | 2,200–7,200 |
| Advertised Duration (Int/Exh) | 285 / 301 |
| Duration @ .050" (Int/Exh) | 235 / 251 |
| Valve Lift (Int/Exh) | 0.621 / 0.624 |
| Lobe Lift (Int/Exh) | 0.365 / 0.367 |
| Lobe Separation Angle | 113° |
| Intake Centerline | 109° |
| Intake Open (BTDC) | 32° |
| Intake Close (ABDC) | 72° |
| Exhaust Open (BBDC) | 86° |
| Exhaust Close (ATDC) | 34° |
| Valve Timing @ .006" | Not specified |
| Gear Attachment | 3-Bolt |
| Usage | Street/Performance |
| Lifter Type | Hydraulic Roller |
| Warranty | 12 Months |
| UPC | 036584195320 |
| Emissions Code | Not specified |
| Make | GM |
| California Proposition 65 | Cancer and Reproductive Harm (P65Warnings.ca.gov) |
Make: GM
Engine Family: LS Gen III / IV with rectangular-port heads
Model Years: 1997–2015
Cam Gear Style: 3-bolt
