Steel Thunder Custom Cycles - aftermarket motorcycle parts for Harley-Davidson and American custom bikes.
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Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

417-468-2326

 

Click here for Velocity Stacks& Breathers

Click here for Carburetors

 

AIR: Air Cleaners & Covers

Click here for Velocity Stacks& Breathers

Click here for Carburetors

FOR METRIC AIR CLEANERS CLICK HERE

Fuel & Air Section

Skull air cleaner kit for Twin Cam 99/L.

Click on image to see larger.

Includes outer cover, backing plate, hi-flow filter & all hardware.

NEW!

V-FACTOR SKULL AIR CLEANER KIT FOR BIG TWIN - V-FACTOR

This high performance air cleaner kit features a flying skull design which is show chrome plated.
Manufactured from extra high strength and light-weight aluminum.
Includes outer cover, backing plate, hi-flow filter element and all mounting hardware.
Can be used with OE CV carburetors or Delphi EFI.


Part#:0184092 - Chrome Plated Kit, Fits Twin Cam 1999/Later  ... $263.41 including free shipping!*




Roland Sands Design Venturi Air Cleaner with 5-spoke design in Chrome.

Chrome

Contrast Cut Air Cleaner is black  with design cutout. Black Air Cleaner.

Contrast Cut™

Venturi Air Cleaner shown on motorcycle.

NEW!

Venturi Air Cleaner - Roland Sands Design

  • Five-spoke exposed filter design enhances air flow.
  • Backing plate promotes smooth airflow into carburetor/throttle body.
  • Built-in internal crank case breathers.
  • Includes high-volume K&N air filter.
  • All mounting hardware included.
  • Made in the U.S.A.

For 93/06 Big Twin models with Stock CV Carb, 01/08 Softail models with Delphi EFI, 04/08 Dyna Glide models with Delphi EFI, & 02/07 FLT models.

#061010-0316 - Chrome Venturi Air Cleaner ... $359.96 including free shipping*

#061010-0317 - Contrast Cut Air Cleaner ... $359.96 including free shipping*

 

 

Please note: These are special order items. While most items ship the same or next business day, these items will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

K&N perfect round mirror custom air filter for HD Big Twin and Sporster

'Perfect Round Mirror'

Teardrop shape chrome air filter from K&N

'Teardrop Mirror'

Ball grooved style teardrop shaped air filter from K&N

'Ball Grooved'

Flamed round chrome air filter from K&N

'Flamed'

Chrome Billet K&N Custom Air Filters for H-D® - Big Twin and Sportster

Absolutely the best flowing, best looking, best horsepower air cleaner currently available for H-D models. Machined from billet aluminum, luster polished, then chrome plated to complement the show bike. Two unique styles and two unique finishes. For Big Twin or Sportster, these custom air cleaners fit all late model stock carburetors. Comes complete and ready to use, including mounting bracket - nothing else to buy. NOTE: Replacement elements available above. Proudly made in the U.S.A. Prices include shipping.*

Description Big Twin 1340cc Part # Price Buy Now
Teardrop 'Mirror' MW12-289 $195.88
Teardrop 'Ball Grooved' MW12-290 $186.99
Teardrop 'Flamed' MW12-317 $195.99
Perfect Round 'Mirror' MW12-291 $189.99
Perfect Round 'Ball Grooved' MW12-292 $195.99
Perfect Round 'Flamed' MW12-318 $195.99
Description Sportster 1200cc Part # Price Buy Now
Teardrop 'Mirror' MW12-285 $195.99
Teardrop 'Ball Grooved' MW12-286 $189.99
Teardrop 'Flamed' MW12-319 $195.99
Perfect Round 'Mirror' MW12-287 $195.99
Perfect Round 'Ball Grooved' MW12-288 $195.99
Swept Air Cleaner Kit for CV or HSR Mikuni Carburetor.

Swept Air Cleaner Kit for CV or HSR Mikuni Carburetor - V-Factor

  • Includes high flow air filter element.
  • Die cast construction.
  • Use chart below for required supports & adapters.

#MU84089 - Swept Air Cleaner Kit ... $220.97 including shipping*

REQUIRED SUPPORTS AND ADAPTERS:  Please purchase with air cleaner.  These are priced to ship with air cleaner, if you wish to purchase alone, please call.  Shipping will be added.  Please note our $35 order minimum.

Model & Year Carburetor Type Required Carb Support Notes Price Buy Now
Big Twin 1990/1991 Constant Velocity (CV) #MU84327  --- $23.85
Big Twin Evolution 1993/1999  Constant Velocity (CV) #MU84328

Includes crankcase breather.

$51.85
Constant Velocity (CV) #MU84343 Must drill backing plate. $36.65
42, 45, or 48 HSR Mikuni #MU82438 Also requires MU82882 adapter (sold below). $83.75
Twin Cam 1999/Later  Constant Velocity (CV) #MU84343 Must drill backing plate. $36.65
42, 45, or 48 HSR Mikuni #MU82435 Also requires MU82882 adapter (sold below). $74.95
Sportster 1991/Later Constant Velocity (CV) #MU84329

Includes Crankcase breather.

$50.60
Constant Velocity (CV) #MU82924 Must drill backing plate. $23.00

#MU82882 Adapter - CV AIR FILTER ADAPTER KIT FOR MIKUNI HSR

Adapts the HSR smoothbore carburetor to an OEM CV air filter assembly.
Can also be used with a custom flat backed air filter assembly designed for a CV type carbureto.r

Mikuni Adapter Kit Fits HSR-42, 45 & 48mm Mikuni carburetor ... $25.65 (Please purchase with air cleaner.  These are priced to ship with air cleaner, if you wish to purchase alone, please call.  Shipping will be added.  Please note our $35 order minimum.)

High flow air filter kit for Big Twin Harley-Davidson motorcycles.

AIR FILTER KIT FOR BIG TWIN - V-Factor

High Flow.
Replaces the highly restrictive OE Air Filter and backing plate to a high flow kit for improved performance.
Designed for use with the OE 8" Round Big Twin Evolution Air Cleaner Cover.
For best results, use with an adjustable Ignition Module and low restriction Exhaust.
Requires Air Filter Support/Engine Breather Kit.
Fits Carbureted Big Twin Evolution & Twin Cam 1993/Later.

Part#:MU84351 - Complete Kit ... $113.29 including shipping*


 

Satin air cleaner with satin insert for Big Twin Delphi fuel injected, Sportsters and 1200CC Buell.

DR-DS288500

Maliair High  Performance air cleaner, Sain with black insert.  Fits Sportster (XL), Buell and Big Twin.

DR-DS288501

Chrome air cleaner with black insert

DS2110-5003

Maliair High-Performance Air Cleaner shown on motorcycle.  For Big Twin Sportster and Buell.

MALIAIR HIGH PERFORMANCE AIR CLEANER - Crossroads Performance

Features high-volume 400cfm design, internal velocity stack and K&N air filter.
Available in satin, black or chrome with a choice of insert.
Support bracket and breather kit required and must be purchased separately.
Made in the U.S.A.

FOR 90-06 CARBURETED BIG TWIN, 01-05 DELPHI FUEL-INJECTED MODELS, 88-06 XL AND ALL 1200CC BUELL MODELS, EXCEPT FUEL-INJECTED MODELS.

Part #: DR-DS288500 Satin air cleaner w/ satin insert $267.36 including shipping*


Part #: DR-DS288501 Satin air cleaner w/ black insert $267.36 including shipping*


Part #: DS2110-5003 Chrome air cleaner w/ black insert $279.96 including shipping*


Part #: DS2110-5004 Chrome air cleaner w/ chrome insert $279.96 including shipping*

PLEASE NOTE:  These are Special Order Items.  While most items ship the same or next business day, special order items take a few extra days to ship.  No express delivery available.  No returns on Special Order Items.

Air Filter assembly for S.U. Carburetor.
AIR FILTER ASSEMBLY FOR S.U. CARBURETOR - Rivera

Made from stamped steel to help keep the weight to a minimum, this Air Filter Assembly includes a reusable foam element, gasket and mounting hardware. It has a 5 1/2" O.D. and is 2" thick. Fits all 4 bolt S.U. carburetors. Made in the U.S.A.
Part#:MU84033 ... $62.80 including shipping*.  
Paul Yaffe Air Cleaner Fairing for Screamin' Eagle air filters.

Air Cleaner Fairing - Paul Yaffe Originals

  • Bolts directly to Screamin' Eagle air filters.
  • Available with a chrome finish.

#DS1010-0088 - Chrome Plated air cleaner fairing ... $279.96 including free shipping*

NOTE:  This is a special order item.  While most items ship the same or next business day, these will take a few extra days to ship.  No express delivery available.  No returns.

Cycle Visions' Mo-Flow Billet Air Cleaner for Big Twins and Sportsters.

Mo-Flow BIllet Air Cleaners contail velocity plate and reusable filter.  Fit Big Twins and Sportsters (XL).

MO-FLOW™ Billet Air Cleaners - Cycle Visions

  • Made from T-6 billet aluminum, polished and chrome-plated.
  • Each air cleaner assembly contains a velocity plate and reusable pleated gauze performance filter that has been engineered and flow tested to obtain maximum airflow and protection for your motor.
  • Hidden fasteners and an internal breather assembly for a clean look.
  • All mounting hardware included.
  • Prices include shipping*.
For Big Twins
#DS1010-0211 For 99-06  Twin Cam w/S&S E or G carb $279.96
#DS1010-0272 For 93-99 Evolution Big Twin w/S&S E or G carb $279.96
For XL (Sportster)
#DS1010-0212 For 91-06 XL motors w/CV carb $279.96
#DS1010-0271 For 91-06 XL motors w/S&S E or G carb $279.96

 

Please note: These are special order items. While most items ship the same or next business day, these items will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

Paintable smoothie aire filter cover.

PAINTABLE

SMOOTHIE AIR FILTER COVER

Give your motorcycle that hundred mile an hour look without even taking it off the kickstand. They are an excellent complement to stretched gas tanks. These smooth style covers are designed to fit over your existing air cleaner cover and can easily be attached with silicone adhesive or by using small screws (not included). Made from a sturdy but lightweight fiberglass, these covers feature a sandable gel coat finish that is compatible with all types of paint. Fits OE and aftermarket covers as listed. Made in U.S.A. PRICES INCLUDE SHIPPING*

Fits: Part # Price Buy Now
S&S and aftermarket teardrop shaped covers MU84337 102.80
Mikuni Large Round Covers MU84338 102.80
OE Constant Velocity (CV) large round cover MU84339 102.80

Maltese Cross air filter cover with black iron cross insert.  Fits Big Twin and Sportster Harley Davidson motorcycles.

Maltese cross air filter cover insert with gold iron cross .

Maltese cross air filter insert.

MALTESE CROSS AIR FILTER COVER INSERT FOR BIG TWIN & SPORTSTER - V-Factor

CNC machined from billet aluminum.
Available with your choice of black, gold or chrome cross on chrome back.
Includes mounting stud for OE style air filter cover.

Prices include shipping*

Fits Big Twin Evolution 1984/1999 (Rpls. HD 29065-94)
Black Cross Buy Now Gold Cross Buy Now Chrome Cross Buy Now
MU84350... $52.55
MU84348... $61.10
MU84349... $55.40

Fits Twin Cam 1999/Later (Rpls. HD 29131-00)
Gold Cross Buy Now
MU84345... $55.40
Early style air filter for 3 hole filter mount carburetors.
EARLY STYLE AIR FILTER FOR 3 HOLE FILTER MOUNT CARBURETORS - V-Factor

Give your bike that nostalgic look by getting rid of the OEM air filter and installing this 7" round, smooth chrome plated steel Air Filter Assembly. It features a reversible foam filter, 7/8" recessed backing plate for more leg room and a 1/8" NPT straight fitting for crankcase ventilation hose. Fits Tillotson, Bendix, early Keihin and S&S (except E and G). To complete the installation, use our 82407 air filter backing plate gasket.
Part#:MU84006 ... $39.95 including shipping*

Yost Twin Cam Ram Charger for Delphi Fuel Injected Harley-Davidson.

Twin Cam Ram Charger for fuel injected motorcycles.

Pre Filters come in 4 colors.

TWIN CAM RAM CHARGER - Yost Performance Products

Designed for all Delphi fuel-injected bikes.
Adds a cool drag look while also increasing horsepower by 5+and increasing torque by 8+ ft.-lbs.
Machined from solid 6061 T-6 billet aluminum.
Tig-welded for superior strength.
Polished to a show-quality finish.
Pre-filters available separately below; comes with one black pre-filter (Please purchase extra or alternate pre-filters with Ram Charger.  Call to order seperately, shipping will be added. Please note that we have a $35 miminum order.)

RAM CHARGER:

Part #: DS1010-0130 - Application: For all 02-05 Delphi fuel-injected Twin Cams ... $433.60 including free shipping*

RAM CHARGER PRE-FILTERS: (Call to order alone, shipping will be added.  Please note that we have a $35.00 minimum order.)

DS1011-0534- Black ...$43.95 when purchased with Ram Charger


DS1011-0535 - Blue ...$43.95 when purchased with Ram Charger

DS1011-0536 - Red ...$43.95 when purchased with Ram Charger

DS1011-0537 - Yellow ...$43.95 when purchased with Ram Charger

Please note: These are special order items. While most items ship the same or next business day, these items will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

Kuryakyn Pro R Hypercharger increases airflow.

PRO R HYPERCHARGER™ - Kuryakyn

The best-flowing Hypercharger™ ever produced.
Careful redesign of all interior shapes increases airflow.
Additional air scoop on outer cover directs air onto the high-flow, washable and reusable air filter.
Unrestricted air under high-load riding situations from huge front butterflies are vacuum operated.
Include all necessary mounting hardware and crankcase breather kit.
PART # 1010-0217 is a complete assembly (CV bolt pattern) that can be used with adapters, brackets or mounting kits to cover applications that do not have a specific kit.

Part #: DS1010-0215 For 99-06 - Twin Cam w/CV carb and 06-07 w/ Delphi EFI ...$278.96 including free shipping*                                                                                       


Part #: DS1010-0216 For 01-05 - Twin Cam w/ Delphi EFI ...$278.96 including free shipping*

Part #: DS1010-0214 - For 93-99 Evolution Big Twin w/ CV carb ...$269.96 including free shipping*                                                                                                          

Part #: DS1010-0213 - For 91-06 XL (Sportster) models w/ CV carb ...$269.96 including free shipping*                                                                                                          

Part #: DS1010-0217 - Pro R cleaner assembly only ...$242.96 including free shipping*

NOTE:  These are special order items.  While most items ship the same or next business day, these will take a few extra days to ship.  No express delivery available.  No returns except for manufacturer defect.

Kuryakyn Pro Series Hypercharger with chrome butterflies.

DRDS-288938

Kuryakyn hypercharger Upgrade Kit

DRDS-288939

PRO SERIES HYPERCHARGER™ - Kuryakyn

Features a 50% larger air filter for massive airflow.
Internal shape has been modified to allow increased airflow and velocity.
One-piece construction, ball-milled, “speed lines” symmetrical butterflies and “Pro” embossed bearing cups.
Edges of Pro Series Hypercharger are radiused for a more streamlined appearance.
Kit contains chrome Pro Series Hypercharger, mounting kit and crankcase breather kit.
An upgrade kit is available for new-style (replaceable bearing cup) Hyperchargers and includes a new “Pro” outer case half, bearing cups, butterflies, large K&N air filter and necessary hardware.

Part#: DS1010-0151 - W/ chrome butterflies for 01-05 Twin Cam w/ Delphi EFI ... $269.96 including shipping*


Part#: DRDS-288938 - W/ chrome butterflies for 99-08 Twin Cam w/ CV carb, 06-07 Delphi EFI ... $259.96 including shipping*

Part#: DS1010-0147 - W/ black butterflies for 99-07 Twin Cam w/ CV carb, 06-07 Delphi EFI $259.96 including shipping*

Part#: DS1010-0149 - W/ chrome butterflies for 99-01 FLT (Dresser and Road King) w/ EFI ... $278.96 including shipping*

Part#: DS1010-0150 - W/ chrome butterflies for 95-98 FLT (Dresser and Road King) w/ EFI ... $278.96 including shipping*

Part#: DRDS-288937 - W/ chrome butterflies for 93-98 80” Evolution w/ CV carb ... $251.96 including shipping*

Part#: DRDS-288936 - W/ chrome butterflies for 91-06 XL (Sportster) w/ CV carbs ... $251.96 including shipping*

Part#: DS1010-0148 - W/ chrome butterflies for custom applications (requires Kuryakyn adapters, brackets and/or mounting kit) ... $223.96 including shipping*

Part#: DRDS-288939 - Upgrade kit ... $125.96 including shipping*

NOTE:  These are special order items.  While most items ship the same or next business day, these will take a few extra days to ship.  No express delivery available.  No returns except for manufacturer defect.

*FREE SHIPPING APPLIES IN CONTINTENTAL 48 UNITED STATES ONLY. AK, HI and APO/FPO will have additional shipping fees. We ship only within the U.S.A. and to APO/FPO (military addresses; weight and size restrictions apply.). We do not accept foreign credit cards. We do not ship to Puerto Rico.

Prefer to call in your order to Steel Thunder? Call toll-free: 1-866-889-7828. 9-5 CST M-F.

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Please note that all prices are subject to change.