Enginetech S40568-STD is a premium standard bore piston ring set for 2001-2016 Chevy, GMC, Hummer 6.6L 400-403ci V8 engines, sold as a complete set covering all cylinders.
Important Notes:
- Sized for standard (unmachined) cylinder bores. Verify your finished bore diameter with a precision gauge before ordering.
- File-fit and gap each ring to the manufacturer's end-gap specification for your application before installation. Improper end gap causes blow-by or ring-end butting under heat.
- Replace piston rings as a complete set during any rebuild. One set covers all cylinders for the engine.
- Premium. Steel top. 3.0Kmm x 2.0mm x 3.0mm. Keystone top.
| Part Number | S40568-STD |
| Grade | Premium |
| Bore Size | Standard |
| Ring Stack (Top/2nd/Oil) | 2.00 / 3.00 / 4.055 |
| Standard Bore Diameter | 3.0K in |
| Quantity | Complete set - covers all 8 cylinders |
| Engine | 6.6L 400-403ci V8 |
| Year Range | 2001-2016 |
| Makes | Chevrolet, GMC, Hummer |
| Country of Origin | US |
| OEM Cross-Refs | Hastings:2D4845, MAHLE:41909 |
Sold as a complete piston ring set - one set covers all cylinders and is required per engine.
Fitment:
- 2001-2004 Chevrolet Silverado 3500 6.6L 403ci V8
- 2001-2004 GMC Sierra 2500 HD 6.6L 403ci V8
- 2001-2004 GMC Sierra 3500 6.6L 403ci V8
- 2001-2005 Chevrolet Silverado 2500 HD 6.6L 403ci V8
- 2003-2004 Chevrolet C4500 Kodiak 6.6L 403ci V8
- 2003-2004 Chevrolet C5500 Kodiak 6.6L 403ci V8
- 2003-2004 GMC C4500 Topkick 6.6L 403ci V8
- 2003-2004 GMC C5500 Topkick 6.6L 403ci V8
- 2004-2004 Chevrolet C5500 Kodiak 6.6L 403ci V8
- 2004-2006 Chevrolet Silverado 2500 HD 6.6L 403ci V8
- 2004-2006 Chevrolet Silverado 3500 6.6L 403ci V8
- 2004-2006 GMC Sierra 2500 HD 6.6L 403ci V8
- 2004-2006 GMC Sierra 3500 6.6L 403ci V8
- 2004-2007 Chevrolet C4500 Kodiak 6.6L 403ci V8
- 2004-2007 Chevrolet C5500 Kodiak 6.6L 403ci V8
- 2004-2007 GMC C4500 Topkick 6.6L 403ci V8
- 2004-2007 GMC C5500 Topkick 6.6L 403ci V8
- 2005-2005 GMC C4500 Topkick 6.6L 403ci V8
- 2007-2009 GMC C4500 Topkick 6.6L 403ci V8
- 2006-2006 Chevrolet Silverado 2500 HD 6.6L 403ci V8
- 2006-2006 Chevrolet Silverado 3500 6.6L 403ci V8
- 2006-2006 GMC Sierra 2500 HD 6.6L 403ci V8
- 2006-2006 GMC Sierra 3500 6.6L 403ci V8
- 2006-2006 Hummer H1 6.6L 400ci V8
- 2006-2007 Chevrolet Express 2500 6.6L 403ci V8
- 2006-2007 GMC Savana 2500 6.6L 403ci V8
- 2006-2007 GMC Savana 3500 6.6L 403ci V8
- 2006-2013 Chevrolet Express 3500 6.6L 403ci V8
- 2007-2007 Chevrolet Silverado 2500 HD Classic 6.6L 403ci V8
- 2007-2007 Chevrolet Silverado 3500 Classic 6.6L 403ci V8
- ...and 31 additional applications
Enginetech piston ring sets are manufactured to OEM specifications and offered in both premium and cast grades to match the demands of stock rebuilds and moderate-performance builds. Each set is application-specific, with ring widths and end-gap characteristics matched to the bore and groove geometry of the engine family it serves. Ring sets are sold by bore size - standard for unmachined bores, with oversizes for blocks that have been bored and honed - so verify your finished bore diameter with a precision gauge before ordering, since rings sized for the wrong bore will not seal correctly. Always file-fit and gap each ring to the manufacturer's specification for your application, and replace rings as a complete set during any rebuild. Enginetech documents every set with the ring stack dimensions, bore size, and cross-references so the correct set reaches the bench the first time.
WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm.
