The 97in. Big Bore kit for 88in. motors yields excellent results with stock cylinder heads.

Feature the largest bore (3.927in.) that can safely be used in a cylinder with stock spigot diameter.

Even though stock cylinders can be bored to fit the 3.927in. pistons, the included S&S cylinders feature a much stronger cast iron liner to stand up to the added power.

Easy installation: no need to bore or split existing cases, just swap the cylinders.

Specifications: 3.927in. bore, 4in. stroke, 97in. displacement, 9.7:1 compression ratio with stock heads (9.3:1 compression ratio with S&S 89cc heads or 10.7:1 with S&S 79cc heads).

Kits include cylinders, pistons, rings and gaskets (head, base and exhaust).

Black or silver powder-coat finish.

Made in the USA.