HKS LEGAMAX Premium Subaru Impreza WRX STI GRB/GRF - 31021-AF014

The HKS LEGAMAX Premium, part number 31021-AF014, is a muffler for the Subaru Impreza WRX STI (GRB and GRF) with the EJ20 or EJ25 turbo engine.

• Part number: 31021-AF014
• Muffler shape: RM (Titan)
• Main material: S304
• Tip diameter: 90 x 2 (left and right) mm
• Center pipe diameter: 65 mm
• Includes center pipe
• Stock option STI exhaust finisher can be installed
• Close noise level (idle): GRB stock L80 R80, HKS 84; GRF stock L81 R81, HKS L89 R88 dB
• Remark (GRB page): R205 and SPEC-C made after Apr 2010 do not comply with Japanese regulations
• Certification No.: JQR20092078

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 LEGAMAX Premium overview

Contact us if you are unsure of fitment or Size HERE