GAS FLOW & PRICES (all
CJS cylinder head preparation you get your heads
thoroughly cleaned, re-shaped intake and exhaust ports, matched manifolds, polished and modified valves
and in some cases modified combustion chambers.
"Ultimate" heads you receive all of the above but with the
addition of new special shaped Colsibro valve guides for longevity,
valve seats machined to competition profiles to maximise flow, and optional flow bench data at extra cost.
Some jobs may
be refused unless new Colsibro race guides are fitted for reliability
reasons. This always applies to 2v heads of the 8mm valve stem
generation. No 2v head with 8mm stems will be worked on
unless guides are fitted.
All heads will be
thoroughly cleaned ready assembly by us of yourself. Gas
flowing or cylinder head re-working is always updated with the newest
realisations based on extensive flow bench and dyno research. Please keep in mind the
heads are not a simple one fits all application. Each head is a one off
and is re-designed to its cam/engine combination and purpose based on