Manley Performance Extreme Duty Stainless Steel Exhaust Valves +1mm Oversized - Subaru WRX 2002-2005 / STi 2004+
Manufacturer Part # 11139-8
Okay you’re in the middle of a motor rebuild and so far you have all your ducks in a row. You’ve got big turbo, forged pistons, flat bill hat, energy drink, oh yeah, VALVES! The Manley Race Series Valves, and Extreme Duty Valves have been designed to make sure your head is moving air effectively so that your engine is using power to its fullest potential.
The exhaust valves have been crafted from a XH-426 stainless exhaust material, and the intake valves have been crafted from NK-842 stainless steel.These valves also feature chrome stems, as well as hard tips, and the design will provide improved flow with the “Pro Flo” underhead.
The valves are finished off with a fully machined, swirl polished finish, and come with a 33mm head diameter.
RallySport Guarantee - 30 Days
Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.
RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.
The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.