2026 KPMI Full Catalog V1 - Flipbook - Page 45
HD KNUCKLEHEAD 1936-1947
®
™
KPMI P/N
Material
O. D.
I. D.
O. L.
Remarks
Quantity
20-20570
Manganese Bronze
0.897"
0.788"
1.065"
Standard
Pkg. of 2
20-20572
Manganese Bronze
0.899"
0.788"
1.065"
+0.002”
Pkg. of 2
20-20580
Manganese Bronze
0.897"
0.788"
1.065"
Standard
Pkg. of 1
20-20582
Manganese Bronze
0.899"
0.788"
1.065"
+0.002”
Pkg. of 1
Harley-DaviDson
Wrist Pin Bushings • Engine Builder Series • Manganese Bronze
Made from Manganese Bronze to exact tolerances, these bushings will meet or exceed 昀椀tment and wear ability of all other replacement style bushings available.
Wrist Pin Bushings • High Performance • C630 Bronze
KPMI P/N
Material
O. D.
I. D.
O. L.
Remarks
Quantity
20-0645
C630 Bronze
0.897"
0.788"
1.065"
Standard
Pkg. of 1
KPMI® has developed what we believe to be the highest quality wrist pin bushings available. Our wrist pin bushings are machined from a solid Nickel Bronze alloy,
with an exceptional Rockwell hardness rating. These bushings are a must for high performance applications.
HD PANHEAD 1948-1965
®
™
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure Open Pressure
@ Lift
Intake
20-20445
.600”
1.500"
154#
389#
.600”
4
H. T. Steel Retainers
4
H. T. Steel Keepers Pr.
4
CrSi Valve Springs
4
H. T. Steel Basewashers
Exhaust
Kit Includes
This lightweight Panhead® spring kit is designed to work with factory covers without interference. Further, the basewasher in this kit has been counter bored to allow the
seal to 昀椀t inside the basewasher which increases the retainer to seal clearance for higher lift cams. The retainers in this kit are designed using the latest CAD software
available. The retainers are tested using 昀椀nite element analysis (FEA) to ensure the retainer can endure high stress levels during operation. By using billet aircraft alloy
material, heat treating it, and then employing our high powered design software, KPMI is able to maximize weight saving by incorporating a series of drilled holes in the
retainers. These retainers are both strong and light, allowing signi昀椀cant reduction to overall valvetrain mass, which is known to improve performance.
Valve Spring Kit • O. E. M. Replacement
Kit Includes
KPMI P/N
Type
H. T. Steel
Retainers
H. T. Steel
Keepers Pr.
CrSi Valve
Springs
H. T. Steel
Basewashers
Intake
20-20430
4
20-20431 4
20-20434
4
20-20432
4
20-20433
Exhaust
Max Valve Lift
Installed Height
Seat Pressure
Open Pressure
@ Lift
.415”
1.375"
129#
272#
.415”
27
All KPMI® retainers are designed using the latest CAD software available. Further, the retainers are tested using 昀椀nite element analysis (FEA) to ensure the retainer
can endure high stress levels during operation. By using billet aircraft alloy material, heat treating it, and then employing our high powered design software, KPMI®
is able to maximize weight saving by incorporating a series of drilled holes in the retainers. These retainers are both strong and light, allowing signi昀椀cant reduction
to overall valvetrain mass, which is known to improve performance. All components are the quality you can expect from KPMI®, manufactured to exact O.E.M.
dimensions. These O.E.M. replacements parts may be purchased separately using the above part numbers.
Visit us at www.kpmi.us
