Our Price:
$1,189.79
This is a completely rebuilt 1500 10-bolt cylinder head applicable to 81-85 Fiat and Bertone X1/9s. Not applicable with 80 1/2 FI cars, or to later 86-88 cars with 14-bolt head. Be sure to check out the multiple pictures!
When milled flat, it increases compression to that of a 1300-series head, with larger valves and better combustion chamber. Throw in a hot cam, and a good valve job, and this unit will really wake up the performance of your car.
We start with a very good condition 1500 head, with 10mm head bolt holes.
All threads / stud holes are intact, and clean coolant passages absent of corrosion or enlarged openings. All spark plug and coolant sensor holes have clean threads, and we replace any valve guide whose measurements are out of spec.
We mill the head flat to completely remove the combustion chamber "ring", and also mill the cambox surface to ensure straightness and help prevent annoying cam-box oil leaks.
Note: Milling the head by this amount WILL affect cam timing. The engine will run and start normally with stock gear, but for optimum performance an adjustable cam timing gear is recommended to synchronize cam and crank timing.
We tap and plug the intake manifold coolant holes with a 5/16 x 20 thread so that they can be easily blocked if desired. The runners and valve throats are fully ported and polished. A trick three-angle valve cut on the seats which has been flowbench proven to increase flow by nearly 40%! New competition valve springs with stock retainers are used, which are guaranteed to put up with a high RPM beating up to 9K RPM without danger of valve float.
Condition: Freshly Rebuilt
Please allow 15-20 working days for delivery.