ARP 654-3750 SAE Bolt Kit 3/8-16 x 3.750 hex 7/16 wrenching black oxide bolts ymm_30 while the bolt kits come

while the bolt kits come with washers

Specifications Socket Size(s) 12mm hex UHL 30mm Thread Length 30mm Grip Length n/amm Thread Diameter-Spacing M10 x 1

When fitted with the optional Evolution Link pipe set (Titanium) and Akrapovič Sound Kit

Astro 1995-2005

AEM (30-0300-ACC) X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit

ARP 654-3750 SAE Bolt Kit 3/8-16 x 3.750 hex 7/16 wrenching black oxide bolts ymm_30 while the bolt kits comeSpecifications Socket Size(s) 7 16 hex UHL 3. 750 Thread Length 1. 000 Grip Length 2. 750 Thread Diameter Pitch 3 8 16 Grip Diameter 3 8 Wrenching 7 16 Head Height 0. 360 Collar Diameter 0. 700