As listed our 77mm, 10.5:1piston is used mainly for street applications to enlarge 1300 engines to 1400cc. This increase in displacement and improved combustion shape gives an 8-10 HP increase and really brings a Giulietta engine to life. It has the same dome and valve reliefs as the 75mm race piston except that for a lower dome height to reduce compression. With a modest 10:5 compression (some street engines now come with 10.5) the engine will perform reliably on 93 octane pump gas. Standard 74mm liners have enough thickness and can be safely bored to 77mm.  All sets come with standard weight wrist pins.

We also offer these as Piston/Liner Sets.

This piston set includes standard wrist pins (84 grams) and conventional Total Seal Ring Set rings.  You should consider the following upgrades: