HKS STEP2 Connecting Rod Set Toyota 86 / GR86 / Subaru BRZ (ZN6 / ZN8 / ZC6 / ZD8) 23004-AT002

HKS STEP2 billet I-beam connecting rods for matched FA20 2.1L and FA24 2.5L capacity-upgrade builds. This is a connecting-rod set; pistons, crankshaft and bearings are separate.

Fitment

• Toyota 86 (ZN6) 2012–2021 — FA20, HKS 2.1L build.
• Subaru BRZ (ZC6) 2012–2021 — FA20, HKS 2.1L build.
• Toyota GR86 (ZN8) 2021 onwards — FA24, HKS 2.5L build.
• Subaru BRZ (ZD8) 2021 onwards — FA24, HKS 2.5L build.

Specifications

• Part number: 23004-AT002
• Billet I-beam construction, STEP2
• Piston-pin diameter: 22 mm
• Matched capacity-upgrade application

Installation notes

For FA20, use the specified HKS piston kit 21003-AT003, 21003-AT004 or 21003-AT005. For FA24, the manual specifies piston kit 21003-AT007. Both applications require crankshaft 23006-AT003 and crank-pulley bolt SU003-09440. Use the connecting-rod bearing specification in the HKS manual. Engine assembly, machining checks and clearances must follow the appropriate engine-build instructions.

HKS installation manual and component requirements · HKS product specifications