93 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. s l California Residents WARNING: Cancer www.P65Warnings.ca.gov. Header Collector Bolts Application Dia. UHL Total flange thickness 12-Point CHEVROLET All standard headers and collectors with 3 bolt flange (6 pcs ) 3/8-24 1 250 0 475- 600 400-1213 l All standard headers and collectors with 3 bolt flange (6 pcs ) 3/8-24 1 375 0 600- 725 400-1214 l All standard headers and collectors with 3 bolt flange (6 pcs ) 3/8-24 1 500 0 725- 850 400-1215 l Metric Stainless Accessory Studs ➊ Diameter & Thread Pitch ➋ OAL mm (in.) ➌ Thread Length mm (in.) ➍ Thread Length mm (in.) ➎ Nose Length mm (in.) ➏ Min. Grip mm (in.) ➐ Grip Dia. mm (in.) ➑ Broach mm ➒ Wrench Size mm ➓ Collar Dia. mm (in.) 4-Pack 8-Pack 10-Pack 16-Pack M8 x 1.25 x 1.25 32 (1.250) 12.7 (0.500) 12.7 (0.500) 5.1 (0.200) 1.3 (0.050) 8.0 (0.313) 3 10 13.6 (0.535) 400-8001 l 400-8011 l 400-8021 l 400-8031 l 38 (1.500) 14.0 (0.550) 14.0 (0.550) 5.1 (0.200) 5.1 (0.200) 400-8002 l 400-8012 l 400-8022 l 400-8032 l 45 (1.750) 15.2 (0.600) 20.7 (0.815) 5.1 (0.200) 3.5 (0.135) 400-8003 l 400-8013 l 400-8023 l 400-8033 l 51 (2.000) 15.2 (0.600) 21.3 (0.837) 5.1 (0.200) 9.2 (0.363) 400-8004 l 400-8014 l 400-8024 l 400-8034 l 57 (2.250) 15.2 (0.600) 21.3 (0.837) 5.1 (0.200) 15.8 (0.620) 400-8005 l 400-8015 l 400-8025 l 400-8035 l M10 x 1.25 x 1.25 48 (1.900) 17.8 (0.700) 19.1 (0.750) n/a 11.4 (0.450) 10.0 (0.392) 4 12 17.8 (0.700) 400-8006 l 400-8016 l 400-8026 l 400-8036 l 55 (2.150) 17.8 (0.700) 19.1 (0.750) 6.4 (0.250) 11.4 (0.450) 400-8007 l 400-8017 l 400-8027 l 400-8037 l M10 x 1.50 x 1.25 48 (1.900) 17.8 (0.700) 19.1 (0.750) n/a 11.4 (0.450) 10.0 (0.392) 4 12 17.8 (0.700) 400-8008 l 400-8018 l 400-8028 l 400-8038 l 55 (2.150) 17.8 (0.700) 19.1 (0.750) 6.4 (0.250) 11.4 (0.450) 400-8009 l 400-8019 l 400-8029 l 400-8039 l CYLINDER HEAD
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