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Parts / Option Parts

Take your RC car's performance to the next level with Koswork's option parts and hop-ups. From drivetrain upgrades and suspension components to chassis reinforcements — precision-engineered parts built for competitive RC racing.

Koswork 5g Weight (2) KOS04201
Koswork 5g Weight (2) KOS04201
$6.00
Koswork 3/32" Ceramic Precision Ball Diff Balls (w/container) (14) (B6/B7 Series & Associated 2WD Cars) Yokomo, Kyosho, TLR, Xray KOS04133
Koswork 3/32" Ceramic Precision Ball Diff Balls (w/container) (14) (B6/B7 Series & Associated 2WD Cars) Yokomo, Kyosho, TLR, Xray KOS04133
$13.00
Koswork 3/32" Tungsten Carbide Ball Diff Balls (w/container) (14) (B6/B7 Series & Associated 2WD Cars) Yokomo, Kyosho, TLR, Xray KOS04132
Koswork 3/32" Tungsten Carbide Ball Diff Balls (w/container) (14) (B6/B7 Series & Associated 2WD Cars) Yokomo, Kyosho, TLR, Xray KOS04132
$9.00
Koswork 5/64" 2mm Japan Precision Differential Thrust Balls (w/container) (6) (B6/B7 Series & Associated 2WD Cars) KOS04131
Koswork 5/64" 2mm Japan Precision Differential Thrust Balls (w/container) (6) (B6/B7 Series & Associated 2WD Cars) KOS04131
$2.00
Koswork Team Associated CVA/Wheel Hex Hardened Pins 1.6x9.7mm (w/container) (8) KOS04122
Koswork Team Associated CVA/Wheel Hex Hardened Pins 1.6x9.7mm (w/container) (8) KOS04122
$4.00
Koswork Team Associated CVA Coupler & Pin Rebuild Kit (w/container) (2pcs/each) KOS04121
Koswork Team Associated CVA Coupler & Pin Rebuild Kit (w/container) (2pcs/each) KOS04121
$6.00
Koswork Team Associated 3.5×49.5mm Hardend Hinge Pin (w/groove) (2) (B7 & B74 Series) KOS04112
Koswork Team Associated 3.5×49.5mm Hardend Hinge Pin (w/groove) (2) (B7 & B74 Series) KOS04112
$3.20
Koswork Team Associated 3x30mm Hardend Hinge Pin (w/groove) (2) (B74 Series) KOS04110
Koswork Team Associated 3x30mm Hardend Hinge Pin (w/groove) (2) (B74 Series) KOS04110
$3.00
Koswork Team Associated 3.5x48mm Hardend Hinge Pin (2) (B6 & B74 Series) KOS04106
Koswork Team Associated 3.5x48mm Hardend Hinge Pin (2) (B6 & B74 Series) KOS04106
$3.00
Koswork Team Associated 3x34mm Hardend Hinge Pin (2) (B6 & B7 Series) KOS04104
Koswork Team Associated 3x34mm Hardend Hinge Pin (2) (B6 & B7 Series) KOS04104
$2.80 — Sold Out
Koswork 4mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS408/410/412/414/416
Koswork 4mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS408/410/412/414/416
$3.99
Koswork 3mm Button Head Hex Hardened Steel Screw (8) KOSBS304/305/306/308/310/312/314/315/316/318/320/322/324/325/326/330/335/340/345
Koswork 3mm Button Head Hex Hardened Steel Screw (8) KOSBS304/305/306/308/310/312/314/315/316/318/320/322/324/325/326/330/335/340/345
From $3.49
Koswork 2.5mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS2503/2504/2505/2506/2508/2510/2512/2518
Koswork 2.5mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS2503/2504/2505/2506/2508/2510/2512/2518
$3.99
Koswork 2mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS204/206
Koswork 2mm Button Head Hex Hardened Steel Screw (w/container) (8) KOSBS204/206
$3.49
Koswork Tire Glue 20g w/Pin Cap and Tips KOS50101
Koswork Tire Glue 20g w/Pin Cap and Tips KOS50101
$6.99
Koswork O-Ring & Bushing Grease 8ml KOS50011
Koswork O-Ring & Bushing Grease 8ml KOS50011
$5.99
Koswork 10x12x0.1mm & 10x12x0.25mm Shims (4pcs/each) KOS41012
Koswork 10x12x0.1mm & 10x12x0.25mm Shims (4pcs/each) KOS41012
$2.99
Koswork 5x7mm 5mm Shaft Shims KOS40507/-01/-03
Koswork 5x7mm 5mm Shaft Shims KOS40507/-01/-03
$2.99
Koswork 3x5.5mm 3mm Aluminum Washer (8pcs) KOS40355-1/2/1B/2B/3N
Koswork 3x5.5mm 3mm Aluminum Washer (8pcs) KOS40355-1/2/1B/2B/3N
$5.00
Koswork 3x8x0.5mm 3mm Aluminum Washer Blue (8pcs) KOS40308-05B
Koswork 3x8x0.5mm 3mm Aluminum Washer Blue (8pcs) KOS40308-05B
$5.00
Koswork 3x4.8x0.3mm Crank Extend & Bearing Clearance Shims (8pcs) KOS40348-03
Koswork 3x4.8x0.3mm Crank Extend & Bearing Clearance Shims (8pcs) KOS40348-03
$2.99
Koswork 1/8 .21 Engine Exhaust Gasket (2pcs) KOS26011BK/G
Koswork 1/8 .21 Engine Exhaust Gasket (2pcs) KOS26011BK/G
$5.99
Koswork Clear Round Container (w/lid, ID 29mm, H15mm) (5pcs) KOS14012
Koswork Clear Round Container (w/lid, ID 29mm, H15mm) (5pcs) KOS14012
$2.99
Koswork 10x200mm Body Mounting Adhesive Hook & Loop Set (1pcs/each) KOS14518
Koswork 10x200mm Body Mounting Adhesive Hook & Loop Set (1pcs/each) KOS14518
$3.49
Koswork 25x150mm Super Duty Double Sided Tape (2pcs) KOS14501
Koswork 25x150mm Super Duty Double Sided Tape (2pcs) KOS14501
$3.99
Koswork Clear Round Container (w/lid, ID 25mm, H12mm) (10pcs) KOS14011
Koswork Clear Round Container (w/lid, ID 25mm, H12mm) (10pcs) KOS14011
$2.99
Koswork Glow Plug/Clutch Nut Cross Wrench (Nut 7, 8, 10mm & Hex 5mm) KOS13261
Koswork Glow Plug/Clutch Nut Cross Wrench (Nut 7, 8, 10mm & Hex 5mm) KOS13261
$15.00
Koswork Phillips Screwdriver PH00 2mm / PH1 4mm (w/68mm Tip) (Alum Tri Handle) KOS13252-P00/P1
Koswork Phillips Screwdriver PH00 2mm / PH1 4mm (w/68mm Tip) (Alum Tri Handle) KOS13252-P00/P1
$10.99
Koswork Steel 5.5/7.0mm Nut Driver (For 3mm/4mm nut) (w/68mm Tip) (Alum. Tri Handle) KOS13252-N55S/N7S
Koswork Steel 5.5/7.0mm Nut Driver (For 3mm/4mm nut) (w/68mm Tip) (Alum. Tri Handle) KOS13252-N55S/N7S
$12.99
Koswork Aluminum 3.5/4.5mm Nut Driver (For Mini) (w/68mm Tip) (Alum Tri Handle) KOS13252-N35/N45
Koswork Aluminum 3.5/4.5mm Nut Driver (For Mini) (w/68mm Tip) (Alum Tri Handle) KOS13252-N35/N45
$12.99
Koswork Phillips Screwdriver #2 Large 4.0mm (For Tamiya Cars & Associated RC10) (Alum Tri Handle) KOS13251-P4
Koswork Phillips Screwdriver #2 Large 4.0mm (For Tamiya Cars & Associated RC10) (Alum Tri Handle) KOS13251-P4
$11.99
Koswork Hard Coated Aluminum 7mm Compact Wheel Nut Driver (For 4mm nut) (Light Tri Handle) KOS13251-N7
Koswork Hard Coated Aluminum 7mm Compact Wheel Nut Driver (For 4mm nut) (Light Tri Handle) KOS13251-N7
$13.49
Koswork Hard Coated Aluminum 5.5mm Compact Nut Driver (For 3mm nut) (Alum. Tri Handle) KOS13251-N55
Koswork Hard Coated Aluminum 5.5mm Compact Nut Driver (For 3mm nut) (Alum. Tri Handle) KOS13251-N55
$12.99
Koswork Flat Head Engine Tuning Screwdriver 4.0mm (Alum. Tri Handle) KOS13251-F4
Koswork Flat Head Engine Tuning Screwdriver 4.0mm (Alum. Tri Handle) KOS13251-F4
$11.99
Koswork Steel Turnbuckle Wrench (4.0mm & 5.0mm) (For Tekno, Mugen, Yokomo, TLR, Agama) KOS13236
Koswork Steel Turnbuckle Wrench (4.0mm & 5.0mm) (For Tekno, Mugen, Yokomo, TLR, Agama) KOS13236
$14.99
Koswork Steel Turnbuckle Wrench 5.5mm & 7.0mm (For 3mm & 4mm Nut) KOS13237
Koswork Steel Turnbuckle Wrench 5.5mm & 7.0mm (For 3mm & 4mm Nut) KOS13237
$14.99
Koswork Turnbuckle Wrench (3.2, 4, 5, 5.5, 7 & 8mm) KOS13231
Koswork Turnbuckle Wrench (3.2, 4, 5, 5.5, 7 & 8mm) KOS13231
$5.99
Koswork Steel Turnbuckle Wrench (3mm, 3.2mm & 5.5mm) (For Associated Cars & 3mm Nut) KOS13235
Koswork Steel Turnbuckle Wrench (3mm, 3.2mm & 5.5mm) (For Associated Cars & 3mm Nut) KOS13235
$14.99
Koswork Phillips Screwdriver PH00 2mm / PH1 4mm (w/68mm Tip) (Light Tri Handle) Mini KOS13213-P00/P1
Koswork Phillips Screwdriver PH00 2mm / PH1 4mm (w/68mm Tip) (Light Tri Handle) Mini KOS13213-P00/P1
$7.99
Koswork Steel 5.5/7.0mm Nut Driver (For 3/4mm nut) (w/68mm Tip) (Light Tri Handle) KOS13213-N55S/N7S
Koswork Steel 5.5/7.0mm Nut Driver (For 3/4mm nut) (w/68mm Tip) (Light Tri Handle) KOS13213-N55S/N7S
From $10.99
Koswork Aluminum 3.5/4.5mm Nut Driver (For Mini) (w/68mm Tip) (Light Tri Handle) KOS13213-N35/N45
Koswork Aluminum 3.5/4.5mm Nut Driver (For Mini) (w/68mm Tip) (Light Tri Handle) KOS13213-N35/N45
$10.99
Koswork Nut Driver Bit 4.0/4.5/5.0/5.5/7.0/8.0mm 1/4" Drive Hex Power Tip KOS13207-N4/N45/N45L/N5/N55/N7/N8
Koswork Nut Driver Bit 4.0/4.5/5.0/5.5/7.0/8.0mm 1/4" Drive Hex Power Tip KOS13207-N4/N45/N45L/N5/N55/N7/N8
$9.99
Koswork Nut Driver/Hex Wrench Tip Set 1.5, 2.0, 2.5, 3.0mm Hex & 5.5, 7mm Nut Driver 1/4" Drive Hex Power Tip KOS13207-CSET
Koswork Nut Driver/Hex Wrench Tip Set 1.5, 2.0, 2.5, 3.0mm Hex & 5.5, 7mm Nut Driver 1/4" Drive Hex Power Tip KOS13207-CSET
$33.99
Koswork Hard Coated Aluminum 7mm Compact Wheel Nut Driver (For 4mm nut) KOS13204-N7
Koswork Hard Coated Aluminum 7mm Compact Wheel Nut Driver (For 4mm nut) KOS13204-N7
$12.49
Koswork Phillips Screwdriver #2 Large 4.0mm (For Tamiya Cars & Associated RC10) (Light Tri Handle) KOS13204-P4
Koswork Phillips Screwdriver #2 Large 4.0mm (For Tamiya Cars & Associated RC10) (Light Tri Handle) KOS13204-P4
$9.99