The coil on plug are Magnetti Marrelli items bought from Magnetti Marrelli Competition Systems.

I can do the coil pack holder bracket which goes in the centre of the rocker cover if anyone else decides to go this route. It's CNC machined out of high grade 5mm alloy, PM me for details.

Done over 5'000 miles now without missing a beat with this set up.

Not sure on tappet size? I'll just go measure one


He goes to the garage............................................ .........


There 30mm in diameter

As for head flow these heads are probably one of the best flowing 4cyl heads available, and yes possibly even better than the cosworth but thats for another thread.

Hardly anyone has started to highly tune these yet so lets wait and see

For details see

http://www.cncheads.co.uk/products.html

ST170 ported 183 CFM
Cosworth ported 158 CFM

Both using standard valves