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Comp Cams LSR Rectangular Port 239/255 Hydraulic Roller Camshaft (99-13 V8 Sierra 1500)Find parts that fit my vehicle

Item S550860
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361 Reviews of Comp Cams
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      Product Information

      Features, Description, Q&A

      Features

      • Broad Top End Power Range For High RPM
      • Race Only LS Engines With Aftermarket Rectangular Port Cylinder Heads And Higher Compression
      • Hydraulic Roller Cam
      • Operating RPM Range 2,400-7,200
      • Advertised Intake Duration 289
      • Advertised Exhaust Duration 305
      • Intake Duration At .050 Inch Lift 239
      • Exhaust Duration .050 Inch Lift 255
      • Intake Valve Lift 0.624 Inch
      • Exhaust Valve Lift 0.624 Inch
      • Lobe Lift Intake 0.367 Inch
      • Lobe Lift Exhaust 0.367 Inch
      • Lobe Separation 114 Degrees
      • Intake Centerline 110 Degrees
      • Exhaust Close ATDC 35 Degrees
      • Intake Open BTDC 34 Degrees
      • Exhaust Open BBDC 89 Degrees
      • Intake Close ABDC 75 Degrees
      • Camshaft Series LSR Rectangular Port All Out Power
      • Camshaft Gear Attachment 3-Bolt
      • Lifter Type Hydraulic Roller
      • Usage Street / Strip
      • Engine GM LS GEN III/IV 3-Bolt 8 Cylinder (1997-2015)
      • Make GM
      • Warranty 12 Months
      • Fits 99-13 V8 Sierra 1500

      Description

      High Performance Camshaft. The Comp Cams LSR Rectangular Port 239/255 Hydraulic Roller Camshaft is designed to optimize power for race-only LS engines equipped with aftermarket rectangular port cylinder heads and higher compression ratios. It offers a broad top-end power range ideal for high RPM operation, enhancing engine performance for street and strip use.

      Construction and Appearance. This camshaft is manufactured with precise engineering from durable materials suitable for high-performance applications. It features a hydraulic roller design with a finish that balances strength and reliability, engineered specifically for GM LS GEN III/IV engines with a 3-bolt gear attachment.

      Installation. Installation requires mechanical aptitude and moderate experience, as precise timing and setup are essential to ensure optimal performance. No additional drilling is typically required when installed in compatible engines with the specified gear attachment.

      Warranty. This product includes a 12-month warranty against defects in materials and workmanship.

      Application. Designed to fit the 99-13 V8 Sierra 1500, this camshaft enhances performance for this vehicle configuration without additional fitment limitations.

      Comp Cams 54-471-11

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      4.7

      Reviews of Comp Cams Engine Products (361)

      Questions & Answers

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      Will It Fit My Sierra 1500

      • 4.8L V8 - 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
      • 5.3L V8 - 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
      • 6.0L V8 - 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
      • 6.2L V8 - 07, 08, 09, 10, 11, 12, 13