Reinforced Exhaust Valves BMW M5 E34 S38B36 S38B38

The reinforced exhaust valve kits by SUPERTECH for the S38B36 and S38B38 engines comprise 12 valves.

Find below (click on the images) the accessories for the BMW S38 engine:

Not to be confused with the intake valves for the same engine, sold as a separate kit.

Technical specification

• Valve head diameter: 32.00mm (OEM) or 32.50mm (+0.5mm) or 33.00mm (+1mm)
• Valve stem diameter: 6.95mm
• Valve length: 123.70mm or 125.00mm or 126.10mm
• Materials: stainless steel or Inconel
• Number of keeper grooves: 3

SUPERTECH valves are machined from a forged blank, then CNC-machined for optimum 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 inspected using several methods, including 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).