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COMP Cams CL11-602-4 Thumpr 243/257 Hydraulic Flat Cam and Lifter Kit for Chevrolet Big Block 396-454
✅ In stock
F
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 21, 2026 12:12 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰At 50% above its usual rate, this is currently priced higher than what most shoppers have paid.
- 📉Pricing has not dipped this low in roughly six months, placing this offer among the better deals in that window.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
7.76/22
Market Standing
1.13/20
Deal Strength
10/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
JEGS
🚚 Shipping
Free Shipping
Product Details
✓Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
✓2,300-6,200 RPM Operating Range
✓243/257 Duration at .050". 107 Degree Lobe Separation Angle. 0.522"/0.507" Valve Lift
✓CL Kits include a camshaft, a set of lifters, instructions and assembly lubricant.
✓Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note. Best with aftermarket converters and more rear gear.
✓Perfect choice for muscle cars and street rods - Three unique cam designs: Thumpr, Mutha' Thumpr and Big Mutha' Thumpr deliver excellent horsepower gains and broad torque curve.
✓Fits Chevrolet 396-454 Mark IV Big Block
✓Made in USA
⚙️ Specifications
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$291.95
$291.95
High performance street/strip, needs 9:1 compression, 2,500+ stall, intake, gears and headers, rough idle.
Street/strip, needs 9.5:1 compression, 2,800+ stall, intake, gears and headers, very rough idle.
1,800 to 5,600
2,000 to 5,900
2,300 to 6,200
279/296
287/304
294/312
227/241
235/249
243/257
.498"/.483"
.510"/.495"
.522"/.507"
CL11-601-4
CL11-602-4
GK11-600-4
GK11-601-4
