371
BIG TWIN
High Flow Air Cleaner Assembly
“Big Sucker” Air Filter Kits for carbureted or electronic fuel
injected Twin Cam and EV2 Big Twin models. The all-in-one
backing plate features a built-in carburetor support and built-in
breather tunnels at each head to decrease crankcase pressure.
Each tunnel exits at the mouth of the carburetor to create a
virtually closed loop system. No oil hoses, no oil fittings, and no
leaking! Stage I kit features a High-Flow filter that accepts all
1993-up oval or round outer covers. Stage II kit features a 20%
larger High Flow filter that requires an 8” 34-0548 or OEM outer
cover. Both kits include a “Big Sucker” aluminum backing plate,
high-flow air filter, chrome banjo bolts for TC88 and 1993-up
EV2 Big Twin, simple instructions and all the necessary hard-
ware.
Stage I Stage II
34-0112
1993-99 Carburetor
34-0178 34-0114 1999-2013 TC models
Will not fit 2008-13 FLT
Will not fit 1999-01 EFI FLT
34-0184 34-0185 2008-13 FLT
34-1128 34-0105 1999-01 FLT EFI, does not fit 1997-98
34-0192
2014-16 FLT
Filter Only
Fits
34-0948
Stage I Kits 34-0112, 34-0178
34-0622
34-1128 Only
34-1067
Stage II Kits 34-0114
34-0098
Bolt Set
Hardware Listing
34-1136
Hardware Set
14-0507
O-Ring
34-0186
Stage I Kit 34-0184
34-0187
Stage II Kit 34-0185
34-0112
34-0948
34-1067
34-0114
34-1128
Stage I
Stage II
34-0178
34-0098
34-0548
34-0566
Installed
34-0548 cover fits Stage II. 34-0566 cover fits Stage I.
8”
7”
35-0184
34-0105
Air Cleaner
Performance Air Cleaner and Backing Plate fits 1999-15
FXST, FLST, 1999-07 FXD and 2002-07 FLT. Includes wash-
able element and backing plate only. Requires 8” stock type
cover and mounting hardware
VT No. Backing Finish
34-0425 Natural
34-1462 Chrome
34-1463 Black
34-0425
34-1462
34-1463
Important Note:
Some items on this page may be emission-related parts subject to California or other emission control laws. Please
see note on for important information regarding emission control regulatory compliance and warranty information.