Manley Exhaust Valves 33mm (1mm Oversized) Extreme Duty 2002-2014 WRX / 2004-2021 Subaru STI | 11139-8 Supra_2020-2023 helping improve airflow and reduce

helping improve airflow and reduce underhood temperatures during spirited driving

and other toxic sulfides

Keep working the material until you have 100% coverage

Actual item may vary from picture

This involves careful analysis and measurements from every angle to create a precise carbon mold can be easily placed over the OEM panel

Manley Exhaust Valves 33mm (1mm Oversized) Extreme Duty 2002-2014 WRX / 2004-2021 Subaru STI | 11139-8 Supra_2020-2023 helping improve airflow and reduceManley Performance has been manufacturing the finest stainless steel valves for over 40 years. Manley valves have been the standard of the industry from their inception, a fact that still remains true as they shift their focus and resources to the Sport Compact Market. The Manley Stainless Race Valves feature chrome stems, hard tips, fully machined surfaces and swirl polishing under their heads. These valves are available in both stock and oversized,