HKS Super Turbo Muffler Subaru Impreza WRX STI GRB/GRF - 31029-AF005

The HKS Super Turbo Muffler, part number 31029-AF005, is a muffler for the Subaru Impreza WRX STI (GRB and GRF) with the EJ20 or EJ25 turbo engine.

• Part number: 31029-AF005
• Muffler shape: SSR (Super Turbo Muffler)
• Main material: S304
• Tip diameter: 124 mm (left and right)
• Center pipe diameter: 75-60 x 2 mm
• Includes center pipe
• Compatible with the vehicle with the stock option STI exhaust finisher
• Close noise level (idle): GRB stock 80, HKS 88; GRF stock 81, HKS 90 dB
• Road clearance: 146 mm (center pipe)
• Remark (GRB page): compatible with SPEC C; R205 not confirmed
• Certification No.: JQR20122093

Fitment

• Subaru Impreza WRX STI (CBA-GRB), EJ20 turbo, 2007/10 to 2014/08. (Source: HKS Japan)
• Subaru Impreza WRX STI (CBA-GRF), EJ25 turbo, 2009/02 to 2014/08. (Source: HKS Japan)

Resources

• HKS Japan product page (GRB)
• HKS Japan product page (GRF)
• HKS Japan Super Turbo Muffler overview

Contact us if you are unsure of fitment or Size HERE