Manley Race Series Exhaust Valve Set Nissan SR20DET.

(Price is for a set of 8x Race Series Exhaust valves). -Exhaust valve Diameter:  30.15 mm (stock) or 31.15mm ( 1.0mm oversize). -Stem Diameter 7.00mm. - 102.40 mm Length. - These exhaust valves feature a 1mm stem diameter reduction in the keeper groove area to allow the use of the same valve springs, retainers and locks as the intake valves. Manley valves have set the standard for excellence in quality, material and design in the performance world for four decades. Manufactured from proven Race Master materials, Manley valves feature chrome stems, hard tips, fully machined surfaces and swirl polished radii. Many applications are Pro Flow design for maximum air flow. Note: Manley Performance strongly recommends that customers check their valve guide size in order to achieve the proper valve stem to guide clearance. Guides may need to be honed when replacing stock factory valves.