Take your Small Block Chevy to the next level with the ThumpLine 300/320 Hydraulic Roller Camshaft, engineered for serious street/strip and track enthusiasts. With advertised duration of 300°/320°, duration @ .050" of 243°/257°, and lift of .533"/.519" (with 1.7:1 rockers), this camshaft is built for aggressive airflow and top-end horsepower while still maintaining hydraulic roller reliability. This cam is ground on a 108° LSA standard, but we also offer 106°, 108°, 110°, 112°, and 114° options to tailor your powerband to your exact build.
🔧 Camshaft Specs:
Advertised Duration: 300° Intake / 320°
Exhaust Duration @ .050": 243° Intake / 257° Exhaust
Valve Lift (with 1.7:1 rockers): .533" Intake / .519" Exhaust
Standard LSA: 108° (other options: 106°, 110°, 112°, 114°)
RPM Range: 2,500 – 6,200+ RPM
Cam Type: Hydraulic Roller
📊 LSA Options & Effects: 106° LSA – Very rough, aggressive lope. Strongest low-end torque hit. Best for drag racing and all-out performance.
108° LSA (Standard) – Choppy, hard-hitting idle with strong midrange torque. Perfect street/strip balance of sound and power.
110° LSA – Moderate lope with a more stable idle. Offers a broader torque curve and improved drivability.
112° LSA – Smoother idle, better vacuum for power brakes & accessories. Wide powerband with softer bottom end.
114° LSA – Smoothest idle, EFI- and boost-friendly. Best for nitrous or forced induction builds needing controlled torque delivery.
✅ Recommended Upgrades: 2800+ Stall Converter Headers & Free-Flowing Exhaust High-Performance Valve Springs Double Roller Timing Chain Kit Hardened Valve Locks & Steel Retainers High-Zinc (ZDDP) Oil for Longevity
🚗 Best For: Street/strip builds pushing their limits High-performance SBC muscle cars & hot rods Racers demanding lethal top-end pull with a lopey, aggressive idle Engines running high-flow heads, long-tube headers, and performance intakes
⚡ Built by REDLINE CAMS – Over 30 Years of Proven Performance. Every cam is precision-ground in-house for uncompromised quality and real-world results..
ThumpLine 300/320 Small Block Chevy Hydraulic Roller Camshaft
⚠️ Important Notes Before Installation
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This camshaft requires high-zinc (ZDDP) oil for break-in and continued use.
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Always verify valve-to-piston clearance and spring coil bind clearance.
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A double roller timing set is highly recommended.
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Recommended supporting upgrades:
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2800+ stall converter (for automatics)
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Headers & free-flowing exhaust
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Upgraded valve springs, locks, retainers, and seals
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3.55–4.10 gears (depending on vehicle use)
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🔧 Tools & Supplies Needed
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Basic hand tools (sockets, wrenches, screwdrivers)
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Harmonic balancer puller
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Torque wrench
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Timing light
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Assembly lube (moly-based)
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Break-in oil with ZDDP
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Gasket set (timing cover, water pump, intake, valve covers)
📖 Step 1 – Disassembly
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Disconnect the battery.
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Drain coolant and remove radiator (recommended for clearance).
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Remove accessory belts, water pump, and timing cover.
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Remove distributor and mark rotor position.
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Remove intake manifold, valve covers, rocker arms, and pushrods.
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Remove timing chain set and old camshaft carefully.
📖 Step 2 – Camshaft Installation
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Clean the block thoroughly and check cam bearings.
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Coat all cam lobes and journals with assembly lube.
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Carefully slide the new REDLINE 300/320 camshaft into place.
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⚠️ DO NOT FORCE — avoid scratching cam bearings.
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Install new timing chain set (straight-up unless degreeing for advance/retard).
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Reinstall timing cover and harmonic balancer.
📖 Step 3 – Valvetrain Setup
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Install new pushrods, rockers, and valve springs (as recommended).
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Set lifters in place with assembly lube.
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Adjust rocker arms:
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Preload hydraulic lifters ~½ to ¾ turn past zero lash.
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Verify coil bind clearance and retainer-to-seal clearance.
📖 Step 4 – Reassembly
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Reinstall intake manifold, gaskets, and valve covers.
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Reinstall distributor (set base timing to manufacturer spec).
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Reconnect cooling system and accessories.
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Reconnect battery.
📖 Step 5 – Initial Startup & Break-In
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Fill engine with high-zinc break-in oil.
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Prime oiling system (using drill & priming tool).
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Start engine and immediately bring RPM to 2,000–2,500 for 20–25 minutes.
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Monitor oil pressure, coolant temperature, and listen for abnormal noise.
📖 Step 6 – Post-Install Checks
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After break-in, change oil & filter.
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Recheck valve lash/preload.
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Recheck ignition timing.
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Verify drivability and idle quality.
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