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Performance Auto Parts for LS Swaps, Muscle Cars & Modern Builds

Shop thousands of in-stock performance parts from trusted brands—engine upgrades, suspension, exhaust, fuel systems, and more. Fast shipping and real-world support from fellow car enthusiasts.

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-19%
Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - +1mm Oversize - Set of 8 Quick View
Supertech

Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - +1mm Oversize - Set of 8

$235.15 $188.16
SPTMAEVI-2304-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - +1mm Oversize - Set of 8
-19%
Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8 Quick View
Supertech

Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8

$364.27 $291.48
SPTMAEVI-2301D-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Mazda/Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8
-19%
Supertech Mazda MZR / Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8 Quick View
Supertech

Supertech Mazda MZR / Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8

$405.83 $324.74
SPTMAEVI-2301D-6MM-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Mazda MZR / Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8
-19%
Supertech Mazda Miata 1.8L Inconel Exhaust Valve - +1mm Oversize - Set of 8 Quick View
Supertech

Supertech Mazda Miata 1.8L Inconel Exhaust Valve - +1mm Oversize - Set of 8

$360.89 $288.78
SPTMAEVI-1206-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Mazda Miata 1.8L Inconel Exhaust Valve - +1mm Oversize - Set of 8
-19%
New
Supertech Honda B16/B18C Loss Motion Beehive Valve Spring Kit Quick View
Supertech

Supertech Honda B16/B18C Loss Motion Beehive Valve Spring Kit

$126.26 $101.04
SPTLMA-HB
.CamshaftsValvetrain All Chassis & Suspension Engine Components Sale Supertech Valve Springs, Retainers
Supertech Honda B16/B18C Loss Motion Beehive Valve Spring Kit
-19%
New
Supertech BMW M50 Triple Groove Valve Locks - Set of 24 Quick View
Supertech

Supertech BMW M50 Triple Groove Valve Locks - Set of 24

$47.48 $37.99
SPTKPR-VW6-T-24
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech BMW M50 Triple Groove Valve Locks - Set of 24
-19%
Supertech Audi / BMW / Opel 6mm Stem Triple Groove Valve Lock (Req 2 Per Valve) - Set of 16 Quick View
Supertech

Supertech Audi / BMW / Opel 6mm Stem Triple Groove Valve Lock (Req 2 Per Valve) - Set of 16

$31.64 $25.32
SPTKPR-VW6-T-16
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech Audi / BMW / Opel 6mm Stem Triple Groove Valve Lock (Req 2 Per Valve) - Set of 16
-19%
Supertech 1997+ Mazda Miata 1.6L/1.8L 6mm Valve Lock (Req 2 Per Valve) - Set of 16 Quick View
Supertech

Supertech 1997+ Mazda Miata 1.6L/1.8L 6mm Valve Lock (Req 2 Per Valve) - Set of 16

$61.95 $49.57
SPTKPR-MIATA97+-16
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 1997+ Mazda Miata 1.6L/1.8L 6mm Valve Lock (Req 2 Per Valve) - Set of 16
-19%
Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 32 Quick View
Supertech

Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 32

$116.51 $93.23
SPTKPR-6T-ST-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 32
-19%
Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 24 Quick View
Supertech

Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 24

$87.37 $69.91
SPTKPR-6T-ST-24
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech Toyota Style 6mm 6 Degree Valve Lock (Req 2 Per Valve) - Set of 24
-19%
Supertech 6mm Single Valve Lock Conversion - Set of 32 (Req 2 Per Valve) Quick View
Supertech

Supertech 6mm Single Valve Lock Conversion - Set of 32 (Req 2 Per Valve)

$89.56 $71.66
SPTKPR-6S-7-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 6mm Single Valve Lock Conversion - Set of 32 (Req 2 Per Valve)
-19%
Supertech 6mm Single Valve Lock Conversion - Set of 20 (Req 2 Per Valve) Quick View
Supertech

Supertech 6mm Single Valve Lock Conversion - Set of 20 (Req 2 Per Valve)

$55.99 $44.80
SPTKPR-6S-7-20
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 6mm Single Valve Lock Conversion - Set of 20 (Req 2 Per Valve)
-19%
Supertech 6mm Single Valve Lock Conversion - Set of 16 (Req 2 Per Valve) Quick View
Supertech

Supertech 6mm Single Valve Lock Conversion - Set of 16 (Req 2 Per Valve)

$44.77 $35.83
SPTKPR-6S-7-16
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 6mm Single Valve Lock Conversion - Set of 16 (Req 2 Per Valve)
-19%
Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 24 Quick View
Supertech

Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 24

$87.37 $69.91
SPTKPR-6N-6-ST-24
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 24
-19%
Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 16 Quick View
Supertech

Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 16

$58.26 $46.62
SPTKPR-6N-6-ST-16
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech Valve Lock 6mm 6 Degree CNC Machined - Set of 16
-19%
Supertech 6.6mm Honda LS Keeper 7 Degree - Set of 32 (Req 2 Per Valve) Quick View
Supertech

Supertech 6.6mm Honda LS Keeper 7 Degree - Set of 32 (Req 2 Per Valve)

$116.51 $93.23
SPTKPR-6.6-LS-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 6.6mm Honda LS Keeper 7 Degree - Set of 32 (Req 2 Per Valve)
-19%
Supertech 5.5mm Valve Lock 7 Degrees - Set of 32 (Req 2 Per Valve) Quick View
Supertech

Supertech 5.5mm Valve Lock 7 Degrees - Set of 32 (Req 2 Per Valve)

$116.51 $93.23
SPTKPR-5.5-7A-ST-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 5.5mm Valve Lock 7 Degrees - Set of 32 (Req 2 Per Valve)
-19%
Supertech 5.5mm Valve Lock 7 Degrees - Set of 16 (Req 2 Per Valve) Quick View
Supertech

Supertech 5.5mm Valve Lock 7 Degrees - Set of 16 (Req 2 Per Valve)

$58.26 $46.62
SPTKPR-5.5-7A-ST-16
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 5.5mm Valve Lock 7 Degrees - Set of 16 (Req 2 Per Valve)
-19%
Supertech 5.5mm Valve Lock 7 Degrees Standard - Set of 32 (Req 2 Per Valve) Quick View
Supertech

Supertech 5.5mm Valve Lock 7 Degrees Standard - Set of 32 (Req 2 Per Valve)

$45.78 $36.64
SPTKPR-5.5-7A-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 5.5mm Valve Lock 7 Degrees Standard - Set of 32 (Req 2 Per Valve)
-19%
Supertech 5mm Single Groove Valve Lock Conversion - Set of 32 (Req 2 Per Valve) Quick View
Supertech

Supertech 5mm Single Groove Valve Lock Conversion - Set of 32 (Req 2 Per Valve)

$126.59 $101.30
SPTKPR-5.0-7S-32
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 5mm Single Groove Valve Lock Conversion - Set of 32 (Req 2 Per Valve)
-19%
Supertech 5mm Single Groove Valve Lock Conversion - Set of 24 (Req 2 Per Valve) Quick View
Supertech

Supertech 5mm Single Groove Valve Lock Conversion - Set of 24 (Req 2 Per Valve)

$94.94 $75.97
SPTKPR-5.0-7S-24
.CamshaftsValvetrain All Engine Components Sale Supertech Valve Locks
Supertech 5mm Single Groove Valve Lock Conversion - Set of 24 (Req 2 Per Valve)
-19%
Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8

$135.51 $108.43
SPTHIVN-200F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8

$232.48 $186.02
SPTHIVN-1030F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8

$232.48 $186.02
SPTHIVN-1030D-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda F20C1/F22C1 Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8 Quick View
Supertech

Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8

$222.53 $178.06
SPTHIVN-1022F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8
-19%
Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8 Quick View
Supertech

Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8

$222.53 $178.06
SPTHIVN-1022D-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda/Acura K20/K24 Black Nitrided Intake Valve - +1mm Oversize - Set of 8
-19%
Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8

$222.48 $178.02
SPTHIVN-1020F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8

$222.53 $178.06
SPTHIVN-1020D-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda D16Z6/D16Y/D15B/D17A Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda D16Z6/D16Y/D15B/D17A Black Nitrided Intake Valve - Set of 8

$213.29 $170.67
SPTHIVN-1012-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda D16Z6/D16Y/D15B/D17A Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda B16A/B17A/B18C Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda B16A/B17A/B18C Black Nitrided Intake Valve - Set of 8

$213.23 $170.63
SPTHIVN-100F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda B16A/B17A/B18C Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda H22A1/H22A4 Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda H22A1/H22A4 Black Nitrided Intake Valve - Set of 8

$222.53 $178.06
SPTHIVN-1006F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda H22A1/H22A4 Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8 Quick View
Supertech

Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8

$213.29 $170.67
SPTHIVN-1000-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda B16A/B18C Black Nitrided Intake Valve - Set of 8
-19%
Supertech Honda B16A/B18C Black Nitrided Exhaust Valve - Set of 8 Quick View
Supertech

Supertech Honda B16A/B18C Black Nitrided Exhaust Valve - Set of 8

$140.06 $112.08
SPTHEVN-200F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda B16A/B18C Black Nitrided Exhaust Valve - Set of 8
-19%
Supertech Honda K20 / F20C1/F22C1 Black Nitrided Exhaust Valve - +1mm Oversize - Set of 8 Quick View
Supertech

Supertech Honda K20 / F20C1/F22C1 Black Nitrided Exhaust Valve - +1mm Oversize - Set of 8

$227.77 $182.26
SPTHEVN-1030F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda K20 / F20C1/F22C1 Black Nitrided Exhaust Valve - +1mm Oversize - Set of 8
-19%
Supertech Honda/Acura K20/F20 Black Nitrided Exhaust Valve - 31mm Std - Set of 8 Quick View
Supertech

Supertech Honda/Acura K20/F20 Black Nitrided Exhaust Valve - 31mm Std - Set of 8

$227.77 $182.26
SPTHEVN-1030D-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda/Acura K20/F20 Black Nitrided Exhaust Valve - 31mm Std - Set of 8
-19%
Supertech Honda K20/K24 Black Nitrided Exhaust Valve - Set of 8 Quick View
Supertech

Supertech Honda K20/K24 Black Nitrided Exhaust Valve - Set of 8

$218.85 $175.12
SPTHEVN-1020F-8
.CamshaftsValvetrain All Engine Components Sale Supertech Valves
Supertech Honda K20/K24 Black Nitrided Exhaust Valve - Set of 8
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