Reinforced Intake Valves BMW M3 E30 S14B23 S14B25

Reinforced Intake Valves SUPERTECH for S14B23 and S14B25 engines, kit of 8 valves.

Find below (click on the images) the accessories for BMW S14 engines:

Technical specification

• Head diameter: 37.00mm (OEM) or 38.00mm (+1mm) or 38.50mm (+1.5mm) or 39.00mm (+2mm)
• Stem diameter: 6.98mm
• Length: 121.40mm or 123.00mm or 123.80mm
• Material: stainless steel
• Keeper grooves: 3

SUPERTECH intake valves are machined from a forged blank on CNC equipment for optimal precision. They then receive a heat treatment (which varies according to the valve's application) and are ground again (super-finishing process). SUPERTECH valves are checked by various means such as ultrasound, X-ray and laser measurement.

For more than three decades, SUPERTECH has worked to find the most suitable materials for each valve and each application in order to increase reliability. There are therefore different valve materials such as stainless steel, Inconel, titanium and sodium (the latter present in the valve stem, for better heat dissipation).

Note: these are the intake valves for the S14. For the matching SUPERTECH exhaust valves for the same engine, see: Reinforced Exhaust Valves BMW M3 E30 S14B23 S14B25.