Manley 99.5mm STD Bore, 9.8 Comp. Pistons Subaru WRX 2006-2014 / STI 2004-2021 vendor_Stop Tech The OEM mounts are made

The OEM mounts are made out of very soft material and have voids in them that cause flex

Street/daily driving is not advised with this kit

Be sure you know whether you have a 6 bolt or a 7 bolt 4G63 before ordering

Add more power to your vehicle

Silicone has a much higher strength than the OEM rubber hoses which will prevent the hoses from expanding

Manley 99.5mm STD Bore, 9.8 Comp. Pistons Subaru WRX 2006-2014 / STI 2004-2021 vendor_Stop Tech The OEM mounts are madePart #: 612100C 4 Manley forged and dished pistons for the EJ257 are machined of high strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Round wire locks, tool steel wrist pins and piston rings are included with every set at no additional charge. A proprietary multi step top ring groove machining process assures optimum control of the groove's size, geometry, flatness and finish. Precise pinhole