The Enginetech HB171 is a replacement Torque-to-Yield (TTY) cylinder head bolt set for 1997-2004 Buick/Cadillac/Chevrolet 5.7L/5.3L/4.8L engines.
Important Notes
- Two sets required per engine - one set per cylinder head.
- Engines w/ 1st design bolts of 3 different lengths
Specifications
| Part Number | HB171 |
| Product Type | Torque-to-Yield (TTY) Head Bolt Set |
| Bolt Type | Single-use TTY - do not reuse |
| Cross-References | FEL-PRO:ES72173, Victor Reinz:GS33380, MAHLE:GS33380 |
Vehicle Fitment
- 1997-2004 Chevrolet Corvette 5.7L 350ci V8 OHV [VIN:G]
- 1998-2002 Chevrolet Camaro 5.7L 350ci V8 OHV [VIN:G]
- 1998-2002 Pontiac Firebird 5.7L 350ci V8 OHV [VIN:G]
- 1999-2000 Chevrolet Silverado 2500 5.3L 325ci V8 OHV [VIN:T]
- 1999-2000 GMC Sierra 2500 5.3L 325ci V8 OHV [VIN:T]
- 1999-2004 Chevrolet Silverado 1500 4.8L 294ci V8 OHV [VIN:V]
- 1999-2004 GMC Sierra 1500 4.8L 294ci V8 OHV [VIN:V]
- 2000-2004 Chevrolet Suburban 1500 5.3L 325ci V8 OHV [VIN:T]
- 2000-2004 Chevrolet Tahoe 4.8L 294ci V8 OHV [VIN:V]
- 2000-2004 Chevrolet Tahoe 5.3L 325ci V8 OHV [VIN:T]
- 2000-2004 GMC Yukon 5.3L 325ci V8 OHV [VIN:T]
- 2000-2004 GMC Yukon XL 1500 5.3L 325ci V8 OHV [VIN:T]
- 2001-2003 Chevrolet Silverado 1500 HD 6.0L 364ci V8 OHV [VIN:U]
- 2001-2003 GMC Sierra 1500 6.0L 364ci V8 OHV [VIN:U]
- 2001-2003 GMC Sierra 1500 HD 6.0L 364ci V8 OHV [VIN:U]
- 2001-2004 Chevrolet Corvette 5.7L 350ci V8 OHV [VIN:S]
- 2002-2004 Cadillac Escalade 5.3L 325ci V8 OHV [VIN:T]
- 2002-2004 Chevrolet Avalanche 1500 5.3L 325ci V8 OHV [VIN:T]
- 2002-2004 Chevrolet Suburban 1500 5.3L 325ci V8 OHV [VIN:Z]
- 2002-2004 Chevrolet Tahoe 5.3L 325ci V8 OHV [VIN:Z]
- 2002-2004 GMC Yukon 5.3L 325ci V8 OHV [VIN:Z]
- 2002-2004 GMC Yukon XL 1500 5.3L 325ci V8 OHV [VIN:Z]
- 2003-2004 Chevrolet Express 1500 5.3L 325ci V8 OHV [VIN:T]
- 2003-2004 Chevrolet Express 2500 4.8L 294ci V8 OHV [VIN:V]
- 2003-2004 Chevrolet Express 2500 5.3L 325ci V8 OHV [VIN:T]
- 2003-2004 Chevrolet Express 3500 4.8L 294ci V8 OHV [VIN:V]
- 2003-2004 Chevrolet Express 3500 6.0L 364ci V8 OHV [VIN:U]
- 2003-2004 Chevrolet SSR 5.3L 325ci V8 OHV [VIN:P]
- 2003-2004 Chevrolet Trailblazer EXT 5.3L 325ci V8 OHV [VIN:P]
- 2003-2004 GMC Envoy XL 5.3L 325ci V8 OHV [VIN:P]
- 2003-2004 GMC Savana 1500 5.3L 325ci V8 OHV [VIN:T]
- 2003-2004 GMC Savana 2500 4.8L 294ci V8 OHV [VIN:V]
- 2003-2004 GMC Savana 2500 5.3L 325ci V8 OHV [VIN:T]
- 2003-2004 GMC Savana 3500 4.8L 294ci V8 OHV [VIN:V]
- 2003-2004 Hummer H2 6.0L 364ci V8 OHV [VIN:U]
- 2004 Buick Rainier 5.3L 325ci V8 OHV [VIN:P]
- 2004 Cadillac CTS 5.7L 346ci V8 OHV [VIN:S]
- 2004 GMC Envoy XUV 5.3L 325ci V8 OHV [VIN:P]
- 2004 Pontiac GTO 5.7L 350ci V8 OHV
Enginetech TTY (Torque-to-Yield) head bolt sets are engineered to
OEM specifications for proper cylinder head clamping force during engine rebuilds. TTY
bolts are designed for single use - they stretch plastically during torquing to achieve
precise clamp load and must never be reused. Enginetech packages head bolts in per-head
quantities for popular applications, making it straightforward to order exactly what your
engine requires. Always follow the manufacturer's torque sequence and torque angle
specification when installing TTY head bolts. Verify part fitment by year, make, model,
and engine displacement before ordering.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
