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8931 1" 12 Point Locking Header Bolt Kit for GM Small and V6 with 3/8" Bolts
✅ 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 16, 2026 4:08 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 20% 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
0.9/22
Market Standing
0.62/20
Deal Strength
0/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
ONVERTY
🚚 Shipping
Free Shipping
Product Details
✓SMALL BLOCK CHEVY HEADER KIT (12-PIECE): Designed specifically for Small Block Chevrolet (SBC) engines, the Model 8931 kit includes (12) 3/8-16 x 1-inch locking bolts featuring a precise 12-point (12pt) head to securely fasten your exhaust headers.
✓FAIL-SAFE MECHANICAL LOCKING: Manufactured by Stage 8, this patented active mechanical locking system provides a fail-safe solution that prevents fastener loosening even under extreme engine vibration when installed as directed.
✓PREVENTS EXHAUST LEAKS: Say goodbye to blown header gaskets. Engineered to withstand severe thermal expansion cycles, the heavy-duty Grade 8 steel will not stretch when hot, ensuring your header flanges stay tightly sealed.
✓EASY INSTALLATION & FULLY REUSABLE: The 12-point (12pt) heads allow for easier wrenching in tight engine bays. The entire locking mechanism is completely removable and perfectly reusable without losing any locking performance.
✓INSTANT VISUAL INSPECTION: Features a premium duplex nickel finish for maximum rust and corrosion resistance. The active locking mechanism allows for quick visual inspections without needing a wrench. Backed by a Limited Lifetime Warranty.
⚙️ Specifications
Stage 8
Stage 8
SB CVY HDR BLT KIT/
8.4 ounces
8931
Nickel
Manufacturer
Stage 8
Brand
Stage 8
Model
SB CVY HDR BLT KIT/
Item Weight
8.4 ounces
Item model number
8931
Exterior
Nickel
Manufacturer Part Number
8931
ASIN
B000NN4BYK