SKU: 134-3201 | UPC: 672036034429
ARP LS1 LS2 Water Pump and Thermostat Housing Bolt Kit for Chevy Gen III/IV Engines
ARP 134-3201 bolt kit fastens the water pump and thermostat housing on Chevrolet LS1 and LS2 engines found in Corvettes Camaros GTOs Firebirds and trucks. These 8740 chromoly bolts deliver reliable clamping force to prevent coolant leaks during high-heat high-pressure operation in street or track use. Engine builders count on this hardware to ensure consistent coolant flow for better performance and longevity versus stock bolts.
Key Features
- High-Strength Material: Forged 8740 chromoly alloy rated to 200000 psi resists fatigue and vibration for dependable sealing on LS blocks
- Complete Kit Contents: Includes 4x M8x1.25x35mm bolts for water pump 2x M6x1.0x20mm bolts for thermostat housing plus hardened washers
- Corrosion-Resistant Finish: Black oxide coating reduces friction during install and protects against rust in harsh engine bay conditions
- Standard Hex Heads: 6-point design uses common 10mm and 8mm tools for straightforward replacement without specialty equipment
- Precise Torque Specs: Water pump bolts at 22 ft-lbs thermostat at 8 ft-lbs with lubed threads for accurate even clamping load
Product Notes
- Use ARP thread lubricant or moly paste on bolts for precise torque and reuse capability
- Inspect washers for flatness before install to distribute load evenly across surfaces
- Compact kit ships in 5in W x 1in H x 7in L box weighing 0.4 lbs net for quick delivery
Installation Notes
- Professional installation recommended.
- Clean mounting holes and surfaces thoroughly before torquing to ARP specs
- Compatible with OEM or aftermarket water pumps and housings on iron aluminum LS blocks
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | C5 LS1 |
| 1998-2002 | Chevrolet | Camaro | Z28 SS LS1 |
| 1998-2002 | Pontiac | Firebird | Formula Trans Am LS1 |
| 2004 | Pontiac | GTO | LS1 |
| 2005-2007 | Chevrolet | Corvette | C6 Base LS2 |
| 2005-2006 | Pontiac | GTO | LS2 |
| 2005-2009 | Chevrolet | SSR | LS2 |
| 2005-2006 | Chevrolet | TrailBlazer SS | LS2 |
| 2007 | Chevrolet | Silverado 1500 Classic | 6.0L LS2 |
| 2007 | GMC | Sierra 1500 Classic | 6.0L LS2 |
Why Choose ARP?
- ARP fasteners power NHRA Pro Stock and NASCAR engines proving real-world durability
- Every bolt exceeds SAE specs with rigorous testing for high-stress applications
- Precision rolled threads ensure consistent stretch and clamping under repeated heat cycles
Frequently Asked Questions
- Q: Will this kit fit LS1 engines in engine swaps?
A: Yes ARP 134-3201 works on any Gen III/IV LS1 LS2 block iron or aluminum with matching water pump thermostat housing bolt patterns - Q: What alloy and finish are used?
A: 8740 chromoly steel construction with black oxide finish for strength corrosion resistance and low install friction - Q: Does ARP offer a warranty?
A: ARP provides a limited lifetime warranty against manufacturing defects when installed and torqued per instructions
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Secure padded box 5in W x 1in H x 7in L
- Weight: 0.4 lbs
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