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BIG TWIN
MC Forged Piston Sets for Big 
Bore cylinders on Twin Cam. 
Rings are included.
VT No. 
Size 
Ring Set  
   (Standard)
    —
 98” 11-0290
11-0287
 107”  11-0291
11-0287
Twin Cam Big Bore Kit
TC-88 Big Bore 95” Piston Kits sold in pairs, include rings, 
clips and pins, available in flat top 9.3:1 compression ratio or 
high compression 10.25:1. Order gasket set separately.
Size 
9.3:1  10.25:1 Type
Standard
 
11-0338      — 
Cast No Coating
Standard
 
    — 
11-0331  Cast
Standard 
11-0263      — 
Cast, V-Twin, Moly Coated
.005
 
    — 
11-0332  Cast
Head Gaskets 
15-0376  15-0376
Top End Kit 
15-0377  15-0377
Standard Ring 
11-1354  11-1354
Pin Lock 
11-0856  11-0856
Cylinder Base Stud Set fits Twin Cam.
VT No. 2083-8
11-0329
110" Motorshop 4" Big Bore Bolt-On Cylinder and Piston 
Kit
 takes your 96" or 103 cubic inch motor to a full 110 cubic 
inches without removing the engine from chassis. 4" Big Bore 
Cylinder and Piston package increases the internal bore 
from 3⁷⁄₈" to 4", without increasing the outside diameter of the 
cylinder spigot. The cylinder slips into the existing case bore 
without modification. Kit will add a whooping 7 cubic inches of 
displacement for more torque throughout the RPM range. This 
kit includes front and rear cylinder, system-matched pistons 
with rings. Fits 2007-17 FXST, FLST, FXD, 2007-16 FLT.
VT No.   Item
11-1523 
Complete Kit
11-1421 Cylinder Only, each
110”
107” TC-88 Big Bore 
Cylinder Kit
 requires case 
machining and includes forged 
10.5:1 piston kit and either 
silver or black highlighted 
cylinders. Fits 1999-06 TC-88 
models.
VT No.   Item
11-1257  
Kit, Black
11-1259  Kit, Silver
11-0287  Piston Kit
15-1375  Top End Gasket Kit
107”
11-0331
11-1523
11-1257
11-1421
Gary Bang Top End 
Gasket Kit 
for TC-95 and 
TC-103 application. Fits 
1999-2004 FLT, FXD, 
2000-2004 FXST, FLST.
VT No. 15-1471
M-8 Big Bore Black Cylinder Set with machined edge fins 
increase the bore size from 124" to 128". These cylinders have 
4.250 bore and require the use of Wiseco piston set 11-9983. 
For use with stock 4.375" flywheels but require case boring. 
Black cylinder set with machined edge fins also feature a 
slightly larger fin area for better heat dissipation and increased 
cooling.
VT No. 11-1196
Twin Cam Stock Replacement 
Cylinder 
available in black finish with 
machined finish fins. Available for 96" 
with 3.750" bore and 103" with 3.875" 
bore. Sold each.  For use with stock 
stroke flywheels.
VT No.   OEM 
Engine Type
11-1194  17458-07A  96"
11-1195  17460-07A  103"
11-1195