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SKU: 401-8340 | UPC: 672036045180
ARP 1/4-20in SS 12pt Nut Kit (10/pkg) for 1997-2024 GM LS Vehicles
ARP 1/4-20in stainless steel 12-point nut kit contains 10 nuts designed for secure fastening in high-performance engine applications. These nuts fit GM LS series engines found in Corvettes Camaros Silverados and more used on timing covers headers valve covers and accessory brackets. The 12-point design delivers reliable torque application while stainless steel construction handles heat moisture and vibration in demanding builds.
Key Features
- Stainless Steel Material: Resists corrosion and maintains integrity in engine bays exposed to coolant oil and exhaust gases
- 12-Point Head Design: Offers 12 contact points for wrench or socket engagement preventing slippage and nut rounding during high-torque assembly
- 1/4-20 Thread Size: Matches ARP studs and bolts on LS timing covers headers and manifolds for precise thread engagement and clamping force
- 0.500in Nut Height: Provides adequate thread engagement in space-constrained areas without interfering with components
- 10-Piece Kit Packaging: Supplies exact quantity needed for common jobs like header installs or cover replacements saving time and cost
Product Notes
- Inspect studs for damage and clean all threads prior to installation
- Store in dry area to preserve stainless finish and thread accuracy
- Packaged in protective plastic bag inside cardboard sleeve for damage-free delivery
Installation Notes
- Professional installation recommended.
- Use 3/8in 12-point socket for proper fit and avoid standard 6-point tools
- Lubricate threads with ARP Ultra-Torque for accurate torque values up to 12 ft-lbs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | LS1 LS6 |
| 1998-2002 | Chevrolet | Camaro | LS1 Z28 SS |
| 1998-2002 | Pontiac | Firebird | WS6 Trans Am |
| 1999-2007 | Chevrolet | Silverado 1500 | 5.3L LS |
| 2004-2006 | Pontiac | GTO | LS1 LS2 |
| 2007-2013 | Chevrolet | Silverado 1500 | 6.0L 6.2L LS |
| 2014-2024 | Chevrolet | Corvette | C7 LT1 LT4 C8 LT2 |
Why Choose ARP?
- Trusted by professional race teams in NHRA NASCAR and drag racing
- Manufactured from premium materials with exact tolerances for repeatable performance
- Backed by decades of engineering focused on extreme-duty engine fastening
Frequently Asked Questions
-
Q: Will these nuts work on GM LS timing chain covers and headers?
A: Yes they directly replace OEM nuts on 1/4-20 ARP studs for LS timing covers headers exhaust manifolds and valve covers providing stronger hold under boost and heat -
Q: What type of stainless steel is used?
A: ARP uses high-grade 300 series stainless steel with strength ratings exceeding 100000 psi and excellent resistance to galling and stress corrosion -
Q: What warranty coverage applies?
A: ARP offers limited lifetime warranty on these nuts against defects in materials and workmanship when used as directed in performance applications
Shipping & Handling
- Method: UPS Ground or USPS Priority Mail
- Availability: In stock - ships same or next business day
- Packaging: Compact 6 x 4 x 1 inch box with protective insert
- Weight: 0.2 lbs
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