4 1/8" BORE CYLINDERS
KITS FOR 07-up TWIN CAM
Black Highlight 3.938" BORE CYLINDERS
10.5:1 FLAT-TOP PISTONS
reliable big bore kits are also our most easy to assemble! Our bolt-on big bore
kits are the best and most reliable way to get instant access to increased
horsepower and torque. How much, you ask? Each of our bolt–on big bore kits
increases your power and torque gain by at least 25–30% on average, just by
bolting in our cylinders and pistons!
comes with a set of our aerospace grade all aluminum nickel–silicon carbide
plated bore cylinders as well as our custom forged Revolution piston kits, and
let’s not forget the high performance head and base gasket set! For the
quickest access to high performance gain, the 98” and 107” bolt-on big bore
kits definitely give the best bang for the buck!
comes with the option of three stock colors: Black with Highlighted (silver)
fin edges, Natural/Silver, and All Black. For further specs and information,
see the descriptions for each kit below.
Big Bore Kit: Our 107” Bolt–On Big Bore Kit uses the same all aluminum plated
3.938” bore as the 98” kit, but with a different forged piston matched to fit
the 4.375” stroke of the 2007 and later twin cam models. Although only one
piston is offered with this application, we can lower the 10.5:1 compression
with a .045” gasket kit upon request.
XL 883 TO 1200 CONVERSION KITS
SUPER STOCK™ CYLINDER HEADS WITH STOCK BOLT PATTERN
106" HOT SETUP KIT
96" SIDEWINDER KITS
SIDEWINDER® BIG BORE STROKER KITS
74" AND 80" TOP END KITS
93" HOT SET-UP KITS
95" HOT SETUP KIT FOR 88" ENGINES
96" HOT SET UP KIT
124" HOT SETUP KITS