GM PRODUCTS
GM Locking Header Bolt Kits
Stage 8 Locking Header Bolts easy to use and they are real assurance against horsepower loss or gasket failure created by loose nuts or bolts.
The unique patented and trademarked functional design is just three pieces: a bolt (4130 Alloy Steel), a locking retainer and a spring clip.
The header bolt kits are application specific as either hex head with a 3/16 recessed allen head or 12 point, USA or metric. All Stage 8 Locking Header Bolt Kits are sold with all of the necessary hardware for your application.
GM Locking Header Bolt Kits By Application
NOTE: DHH = DOUBLE HEX HEAD BOLT, INCLUDES 3/16 RECESSED ALLEN HEAD
| Inline 6/6 Cylinder | |||
|---|---|---|---|
| Inline 6 | 6911 | (8) 3/8-16×1 1/4″ bolts 12pt | Buy Now |
| V6 With 3/8 Bolts | 8911 | (12) 3/8-16×3/4″ bolts 6pt DHH | Buy Now |
| 8911A | (12) 3/8-16×1″ bolts 6pt DHH | Buy Now | |
| 8931 | (12) 3/8-16×1″ bolts 12pt | Buy Now | |
| 8951 | (12) 3/8-16×1″ bolts 6pt Stainless Steel DHH | Buy Now | |
| V6 2.8 Liter | 6910 | (12) 8mm-1.25x25mm bolts 6pt DHH | Buy Now |
| V6 3.8 Liter | 6912 | (12) 5/16-18×7/8″ bolts 6pt DHH | Buy Now |
| 8 Cylinder | |||
|---|---|---|---|
| Small Blocks 265-400 cu/in |
8911 | (12) 3/8-16×3/4″ bolts 6pt DHH | Buy Now |
| (exc. ZR1 and w/ Brodix heads) | 8911A | (12) 3/8-16×1″ bolts 6pt DHH | Buy Now |
| 8911B | (12) 3/8-16×1 1/4″ bolts 12pt | Buy Now | |
| 8931 | (12) 3/8-16×1″ bolts 12pt | Buy Now | |
| 8951 | (12) 3/8-16×1″ bolts 6pt Stainless Steel DHH | Buy Now | |
| Small Blocks w/ Brodix heads | 8912A | (16) 3/8-16×1″ bolts 6pt DHH | Buy Now |
| All LT Series (LT1 thru LT4) 2014-on | 8917 | (10) 8mm-1.25x25mm bolts 6pt DHH | Buy Now |
| Small Blocks w/ 8mm bolts – All LS Series (LS1 thru LS9), LM7, 4.8 thru 7.0 Liter | 8900 | (12) 8mm-1.25x25mm bolts 6pt DHH | Buy Now |
| ZR1 350 C.I.D. | 8908 | (32) 8mm-1.25x30mm bolts 12pt | Buy Now |
| OEM Corvette headers ’84-’95 | 8907 | (12) 3/8-16×2″ bolts 12pt | Buy Now |
| Small Block Chevrolet Header Bolt Kit | 8931B | (12) 3/8-16X1 1/4″ 12PT | Buy Now |
| Big Blocks 396 – 502 cu/in | 8912 | (16) 3/8-16×3/4″ bolts 6pt DHH | Buy Now |
| (exc. 348 & 409) | 8912A | (16) 3/8-16×1″ bolts 6pt DHH | Buy Now |
| 8912B | (16) 3/8-16×1 1/4″ bolts 12pt | Buy Now | |
| Chevrolet LS1-LS9 Header Bolt Kit | 8932 | (16) 3/8-16×1″ bolts 12pt | Buy Now |
| 8952 | (16) 3/8-16×1″ bolts 6pt Stainless Steel DHH | Buy Now | |
| Big Blocks 348 & 409 cu/in | 8101S | (14) 3/8-16×1″ bolts 6pt DHH | Buy Now |
| Vortec 8100 | 8912V | (16) 8mm-1.25x25mm bolts 6pt DHH | Buy Now |
| 6.2 Liter Diesel | 8912M | (16) 10mm-1.50x22mm bolts 6pt | Buy Now |