Intake port sleeves for converting 32mm 850 RH4 heads to 30mm RH10 ports for improved perfomance. Also works for Combat heads.

$39.00

850 street bike 30mm RH10 heads are prefered because the 30mm ports have a higher flow velocity.  Easily convert your 32mm ports to 30mm by simply sliding and gluing in these aluminum sleeves with loctite – you don’t even have to take off the head (just the manifolds).  The end of the sleeve is flaired so flow is not interupted.  Re-use your original manifolds.   (see installed sleeve in stock RH4 head).

Category: