ICT Billet 551681 LS Starter Bolt Kit, Long & Short, Grade 10.9
$21.99
A set of three USA-made, grade 10.9 flange-head starter bolts for GM LS engines, for factory-style starters that use two long bolts or one long and one short.
- Fits: GM LS-series engines with a 2-bolt starter pattern, including 4.8L, 5.3L, 6.0L & 6.2L
- Kit: 3 bolts: 45 mm and 110 mm lengths (per ICT Billet)
- Grade 10.9: Heavy-duty, high-strength metric flange bolts
- Zinc coated: Resists corrosion and helps keep threads from seizing
- No washers needed: Flanged JIS-style heads; made in the USA
Amazon price as of Oct 10, 2026, subject to change. Check Amazon for the current price. Checkout is completed on Amazon, not through Planet X Performance.
The ICT Billet 551681 kit replaces the starter mounting bolts on GM LS engines with fresh, high-strength hardware. You get three grade 10.9 metric flange bolts, enough for factory-style starters that use two long bolts or one long and one short. The clear zinc coating protects against corrosion and helps prevent seized threads, and the flanged JIS-style heads mean no washers are needed. ICT Billet has the bolts made in the USA.
Key specs
| Brand / part number | ICT Billet 551681 |
|---|---|
| Quantity | 3 bolts |
| Lengths | 45 mm and 110 mm (per ICT Billet) |
| Size | M10 metric |
| Grade | 10.9 |
| Material | Clear zinc-coated steel |
| Head | Hex flange, JIS style |
| Torque spec | 37 lb-ft (per ICT Billet) |
| Made in | USA |
| Weight | 6.4 oz (confirm with the manufacturer or JEGS tech support) |
Fits
- Engines: GM LS-series, 2-bolt starter pattern. Amazon lists LS1, LS2, LS3, LS6, LQ4, LQ9, L92, L99, L33 & LR4 (4.8L, 5.3L, 6.0L & 6.2L)
- Cadillac (per ICT Billet): CTS-V 2004-2007 & 2009-2015; Escalade 1999-2000 & 2002-2014; Escalade ESV 2003-2014; Escalade EXT 2002-2013
- Chevy Camaro (per ICT Billet): Z28/SS 1998-2002; SS 2010-2015; ZL1 2012-2015; Z/28 2014-2015
- Chevy Corvette (per ICT Billet): 1997-2013
- Chevy cars (per ICT Billet): Caprice PPV 2011-2017; SS 2014-2017; SSR 2003-2006
- Chevy trucks (per ICT Billet): Silverado 1500 1999-2013 (1500 Classic 2007, 1500 HD 2001-2007); Silverado 2500 1999-2004; Silverado 2500 HD 2001-2019 and 3500 HD 2007-2019 (6.0L); Silverado 3500 2001-2007; Avalanche 1500 2002-2013 and 2500 2002-2006; Colorado 2009-2012 (5.3L V8)
- Chevy SUVs & vans (per ICT Billet): Tahoe 2000-2014; Suburban 1500 2000-2014, 2500 2000-2013, 3500 HD 2016-2019; TrailBlazer 2003-2009 (5.3L/6.0L V8); TrailBlazer EXT 2003-2006 (5.3L V8); Express 1500 2003-2014 and 2500/3500 2003-2020 (V8)
- Hummer (per ICT Billet): H2 2003-2009; H3 Alpha 2008-2010 and H3T Alpha 2009-2010 (5.3L V8)
- Pontiac (per ICT Billet): Firebird Formula/Trans Am 1998-2002; G8 GT/GXP 2008-2009; GTO 2004-2006
In the box: (3) starter bolts. Bolts only, no starter (per ICT Billet).
Check before you buy
- Starter type: Made for factory-style starters that use 2 long bolts or 1 long and 1 short. Some aftermarket starters with a thick billet mounting block call for longer bolts, so check your starter’s instructions
- Torque: ICT Billet lists 37 lb-ft for these M10 bolts. Follow your starter maker’s spec if it differs
Broken starter ear? If the outboard starter mounting ear on your LS block is cracked or broken, the Trinity Starter Bracket can repair it without machining. The block’s inboard starter bolt hole must still be intact. The Trinity can’t fix a block where the whole starter ear is missing.
You’ll complete this purchase on Amazon. As an Amazon Associate, Planet X Performance earns from qualifying purchases.
Reviews
There are no reviews yet.