Kibble White Black Diamond Exhaust valveRef : KIBW00087A / 09261677

Reference: 70-4230 — Brand: KIBBLEWHITE

Black Diamond™ exhaust valve, CNC machined, designed for demanding builds and cylinder head refurbishments on Trail/Adventure and Roadster. Forged from a single piece of EV8 stainless steel, it combines lightness and strength with optimised profiles for excellent gas flow. The stem features a black Nitroneg coating providing better wear resistance and reduced friction.

• Application: Exhaust
• Head diameter: 1.440" (36.58 mm)
• Tulip angle: 24°
• Surface treatment: special German process treated to .002 depth with a surface layer of .0002, superior protection to electroplated chrome/nickel
• Design: profiles modelled in F.E.A. and tested on a computerised flow bench
• Guide compatibility: can be used with cast iron and bronze guides with tight tolerances
• Made in the USA

Ideal for engine refurbishment or preparation, the Black Diamond™ offers geometry designed for stability at high RPM and thermal dissipation. Suitable for both classic and modern models, it is particularly recommended for the Triumph engines listed below when a precise and durable component is sought:

• TRIUMPH THUNDERBIRD 650 TR65 (1983)
• TRIUMPH BONNEVILLE 750 T140 Executive (1982)
• TRIUMPH TIGER 750 TR7T (1981)