Twin Cam Stage 1 Upgrade Essentials

Maximize your bike's potential with our curated Harley-Davidson Stage 1 Upgrade Kits. Engineered to let your engine breathe, these kits deliver an immediate boost in horsepower, torque, and that iconic H-D rumble.

16 products

Impact Wiring Solutions ECU for 2021-2023 Touring and 2023.5 and newer Harley-Davidson Touring models

$1,599

Save $89

ThunderMax 2023.5-Up Touring® Center Cooled Models VVT or non-VVT #: 309-605

~~Regular price $1,088~~ Sale price $999

Save $23

Dynojet Motorcycle Power Vision 4

~~Regular price $522~~ Sale price $499

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T-Man V24 Air Cleaner

$605

1802-0326 Bassani 2x2 Dual Headpipes 2x2 Chrome touring 09-16 Twin Cam

$554

FLO Oil Filter for 1991-2026 Harley Davidson EVO, Twin Cam, & M8

Cometic Cam Change Gasket Kit - '99-'17 Twin Cam made in the USA

$73.45

Save $100

Vance & Hines Pro Pipe 2-into-1 Exhaust System Chrome or Black

~~Regular price $1,249.99~~ Sale price $1,149.99

Save $100

Vance & Hines Hi-Output 2:1 Short Exhaust System or Black

~~Regular price $1,299.99~~ Sale price $1,199.99

Vance & Hines chrome 3" Round Twin Slash Slip-On Mufflers

$460

Trask Air Filter External Breather Kit

$149.99

Save $59.96

S&S 550-0776 2 into 1 Sidewinder® Complete Exhaust System Twin Cam

~~Regular price $1,259.95~~ Sale price $1,199.99

D&D Billet Cat 09-16 2:1 Full Exhaust

$1,348.99

Bassani 1800-2362 2-into-1 Road Rage Exhaust System Stainless Steel

$1,099

B4 2:1 Exhaust - Black or Chrome Straight Can for 95-16 Bagger

$1,099

Save $4.99

1801-1024 Cobra 3" RPT Mufflers for XL - Black

~~Regular price $503.99~~ Sale price $499