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Comp Cams K12-602-4 Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block
✅ 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 14, 2026 9:12 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 32% above its usual rate, this is currently priced higher than what most shoppers have paid.
- 📉It has been quite a while since a more competitive price was available, lending today's offer solid comparative value.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
2.87/20
Deal Strength
0/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Fast Track Auto
🚚 Shipping
Free Shipping
Product Details
✓Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
✓2,500-6,400 RPM Operating Range
✓243/257 Duration at .050". 107 Degree Lobe Separation Angle. 0.5"/0.486" Valve Lift
✓K Kits vary in their contents, but generally contain a camshaft, a set of lifters, valve springs, retainers, locks, valve seals, timing set, assembly lubricant, decals and instructions. Check description for more accurate listing of kit contents.
✓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.
⚙️ Specifications
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$288.95
High performance street, stock converter ok, best with 2,000+ converter and gears. Choppy/thumping idle.
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.
2,000 to 5,800
2,200 to 6,100
2,500 to 6,400
279/297
287/305
295/313
227/241
235/249
243/257
.479"/.465"
.489"/.476"
.500"/.486"
CL12-601-4
CL12-602-4
GK12-600-4
GK12-601-4
