We feel that these are the best pistons for your Spec E30 engine. Working closely with CP, these pistons meet our most stringent expectations and are the finest available anywhere.
With so few areas to take advantage over the competition, you want to run with the best: our VAC CP Pistons.
To match the dome of the OE M20 "i" head & OEM piston
requirements (all at OEM Specs @ OEM thickness, head and block: 8.8:1 compression), and all other specified requirements; a specialized
blank piston slug is sourced as well as a specialized ball machining process is undertaken
to the dome of the piston.
As of the 2010 season to fit within the rules of Spec E30 competition:
"9.3.1.2.2. All pistons, including aftermarket replacements, shall be factory replacement spec
and match factory dome, dish, valve relief depth, ring groove placement, weight and
wrist pin height; compression shall meet factory replacement specifications. The maximum allowable overbore is limited to the largest available factory replacement
piston, not to exceed .020 inch." |
- Made from the best forgings available for uncompromising reliability and performance.
- Sold in matched and balanced sets of 6
- Optimized to be the best class-legal M20 piston available
- Supplied with excellent quality ring set, lightweight pins, and
pin locks.
Keep us in mind; VAC Motorsports is a full engine and machine shop. We can provide any services required from your tech inspection too full A-to-Z car fabrication and setup.