2026 KPMI Full Catalog V1 - Flipbook - Page 63
HD EVOLUTION 1984-1999
®
™
KPMI P/N
20-22650
Type
Max Valve Lift Installed Height Seat Pressure Open Pressure
Intake
.600”
Exhaust
Kit Includes
1.810”
163#
361#
@ Lift
.600”
4
In / Ex H. T. Steel Retainers
4
In / Ex H.T. Steel Keeprs Pr.
4
In / Ex CrSi Valve Springs
4
In / Ex H. T. Steel Basewashers
In/ Ex Red Viton® Seals
4
In Std. Black Diamond™ Valves
2
Harley-DaviDson
Engine Kit with Lightweight Racing Valve Spring Kit
Ex Std. Black Diamond™ Valves
2
Components • Replacement • Engine Kit
KPMI P/N
Description
20-20132
71010-4
20-4171
20-4170
Spring Kit
Intake / Exhaust Seal
Speci昀椀cation
Includes: H. T. Steel Retainers, CrSi Valve Springs, H.T. Steel Basewashers, H.T. Steel Keeprs
Seal • Red Viton®
Intake, Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Exhaust, Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Valve Kit • Black Diamond™ • Black Nitroneg Stems
KPMI P/N
20-22600
Type
Head Diameter
Tulip
Stem
Diameter
Radius
Angle
O. L.
Remarks
Intake
1.840"
46.74mm
0.3100"
R0.236
23°
4.445"
Standard
Exhaust
1.615"
41.02mm
0.3096"
R0.236
29°
4.525"
Standard
Kit Includes
2
In Std. Black Diamond™ Valves
2
Ex Std. Black Diamond™ Valves
Valves • Black Diamond™ • Black Nitroneg Stems
KPMI P/N
Type
Head Diameter
20-4171
20-20900
20-20905
20-20910
20-20915
20-20955
20-20990
20-20965
20-4170
20-20920
20-20925
20-20930
20-20960
20-20970
Intake
Intake
Intake
Intake
Intake
Intake
Intake
Intake
Exhaust
Exhaust
Exhaust
Exhaust
Exhaust
Exhaust
1.840"
2.150"
1.990"
1.940"
1.900"
2.100"
2.020"
2.020"
1.615"
1.650"
1.610"
1.585"
1.700"
1.610"
Stem Diameter
46.74mm
54.61mm
50.55mm
49.28mm
48.26mm
53.34mm
51.31mm
51.31mm
41.02mm
41.91mm
40.89mm
40.26mm
43.18mm
40.89mm
0.3100"
0.3108"
0.3108"
0.3108"
0.3108"
0.3108"
0.3108"
0.3108"
0.3096"
0.3106"
0.3106"
0.3106"
0.3106"
0.3106"
Tulip
Radius Angle
R0.236
23°
R0.550
24°
R0.675
25°
R0.675
25°
R0.675
25°
R0.560
24°
R0.670
25°
R0.645
25°
R0.236
29°
R0.750
25°
R0.750
25°
R0.750
25°
R0.600
25°
R0.750
25°
O. L.
Remarks
4.445"
4.480"
4.440"
4.440"
4.440"
4.475"
4.440"
4.510"
4.525"
4.515"
4.510"
4.505"
4.535"
4.565"
OEM18074-83B
AV&V# AV2150
AV&V# AV1990
AV&V# AV1940
AV&V# AV1900
AV&V# AV2100
AV&V# AV2020A
AV&V# AV2020S
OEM18082-83
AV&V# AV1650
AV&V# AV1610D
AV&V# AV1585
AV&V# AV1700A
AV&V# AV1610S
Valves • Black Diamond™ • Specially Designed for HD Racing Applications
Tulip
Stem
O. L.
Remarks
Diameter Radius Angle
23°
4.400" Branch Heads
20-4169 In Black Diamond™ 1.940" 49.28mm 0.3100" R0.234
23°
4.445" STD Heads
20-20108 In Black Diamond™ 2.000" 50.80mm 0.3100" R0.234
28°
4.420" Racing Pro昀椀le
20-4171R In Black Diamond™ 1.900" 48.26mm 0.3100" R0.344
20-B101 Ex Black Diamond™ 1.615" 41.02mm 0.3096" R0.325 RO1.625 4.460" Branch Heads
40°
4.525" Racing Pro昀椀le
20-4170R Ex Black Diamond™ 1.630" 41.40mm 0.3096" R0.500
* Custom sizes available, see custom KPMI® Valve Order Form at back of catalog. Inconel® is a high nickel content stainless steel classi昀椀ed as a "super
alloy". It retains its mechanical properties at higher temps than other stainless materials. It also resists valve face pitting and recession in performance
applications with unleaded and exotic fuels to a greater degree than other stainless materials. It is an excellent choice for turbocharged and nitrous applications.
Type
Head Diameter
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45
KPMI P/N
