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West Coast Bagger Performance Extended Polished Swingarm Harley Touring 09-20

Manufacturer: Brock's Performance





PART # 604379


FITS: 2009-2020 Harley Touring models

Handcrafted 6061-T6 aluminum extended swingarm
100% bolt-on design can be used with OEM rear wheel, caliper, spacers and associated components 
Offset pivot mount increases oil pan clearance
Offset mounting allows use of longer shocks
Proprietary custom extrusion made exclusively for Brock's Performance
Extends wheelbase from stock to 3 inches over
Designed for use in high-power, high-torque applications
Includes centerless ground hollow 4130 chromoly axle
Reversible billet aluminum axle adjusters for easy wheel adjustments
Includes caliper bracket for use with OEM calipers
PTFE® lined spherical bearings from Worldwide Bearings preinstalled
Includes bushings to use the OEM 3/4” pivot shaft
Interior swingarm width measures 10 7/8” at the axle
(accepts 200 series rear tire on 6.75” wide rim with chain conversion)
42% weight savings vs OEM swingarm 
Designed, machined, and assembled in the USA
Polished aluminum finish

Shock Information:

3-position shock mounts allow flexibility in ride height (+2”, +1”, stock)
Compatible with shock lengths from 13” to 15”
H-D Premium Ride Touring Shocks will only work in the +2” shock position
Brock’s Performance recommends adjustable Bitubo shocks for best performance and adjustability

What do you get when you combine 25 years of sportbike drag racing and innovation with a V-Twin industry cry for a swingarm that can handle the ever-increasing demands of ultra-powerful baggers? Introducing the West Coast Bagger Swingarm™, by Brock’s Performance. Leaning heavily on technology proven in the ‘stupid fast’ turbocharged sportbike area, our tubing, bracing, billet aluminum ends and 28mm Chromoly axle configuration routinely control 750 hp/350 ft-lb no wheelie bar missiles in 6 second/220MPH action.

Adapting this winning combination for smooth operation and long street life for your FL, we installed replaceable PTFE® lined spherical bearings from Worldwide Bearings at the pivot loops. Adding a bit of flexibility to the stance and chassis tunability in the rear, billet 3-position shock mounts are standard allowing for +2”, +1”, and stock height mounting positions. Speaking of flexibility, check out the billet bolt-on brake stay designed to function with the OEM brake hanger. In fact, Brock’s Performance Bagger swingarm is 100% bolt-on using your OEM rear wheel, spacers, and pulley or your favorite aftermarket replacement rear wheel.

Don’t forget the extra 3” length can be worth as much as 3 tenths improvement in the 1/4 mile. The bottom line, weighing in at a little over 1/2 the weight of the OEM swingarm and built to handle as much power as you can throw at it, moving/bent axles can now be a thing of the past, and you can look great and go faster too.West Coast Bagger Swingarm Weight:

Swingarm w/Bearings: 11.10 lb. (5.04 kg)
Axle w/Nuts:
25mm - 2.48 lb. (1.12 kg)
28mm - 2.77 lb. (1.26 kg)
Axle Blocks:
25mm - 0.76 lb. (0.35 kg)
28mm - 0.74 lb. (0.34 kg)
Pivot Bushings: 0.43 lb. (0.20 kg)
Brake Mount w/Screws: 0.55 lb. (0.25 kg)
25mm Total = 15.32 lb. (6.95 kg)

28mm Total = 15.59 lb. (7.07 kg)

OEM Harley-Davidson® Swingarm Weight: 22.78 lb. (10.33 kg)

OEM Harley-Davidson® Axle Weight: 3.55 lb. (1.61 kg)

Total = 26.33 lb. (11.94 kg)

Total Weight Savings = 11.01 lb. (4.99 kg) or 42% of OEM weight


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