Supertech 4A-GE 16V single valve spring kit

Supertech

Supertech Valve Spring Kit | 4A-GE / 4A-GZE 16V (AE86 Corolla / AW11 MR2 / AE92 Corolla)

SKU: 918

$467.74

Spring Configuration

Single Spring – 55 lb Dual Spring – 73 lb

Fitment support available

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Supertech Valve Spring Kit

For 1983–1987 Toyota Corolla AE86, 1984–1989 Toyota MR2 AW11, and 1987–1991 Toyota Corolla AE92 coupe equipped with 4A-GE / 4A-GZE 16V cylinder heads and matching spring, retainer and seat configurations.

Overview

The Supertech Valve Spring Kit pairs performance valve springs with titanium retainers and matching seats for 1983–1987 JDM Corolla AE86, 1985–1987 U.S.-Market Corolla Sport AE86 GT-S, 1984–1989 Toyota MR2 AW11, and 1987–1991 JDM Toyota Corolla AE92 coupes and 1988–1991 U.S.-Market Corolla GT-S AE92 coupe applications with Toyota 4A-GE and 4A-GZE 16-valve cylinder heads using the matching spring, retainer and seat configuration. Two spring-pressure configurations let the parts match the camshaft's required spring loads rather than treating higher pressure as an automatic upgrade.

The single and dual kits include a full set for sixteen valves. The dual configuration also includes matching valve-stem seals and requires the compatible smaller-diameter valve guides, which are sold separately.

Key Features

Complete 16-valve spring and titanium retainer kit
Designed for Toyota 4A-GE / 4A-GZE DOHC 16V cylinder heads
Choice of 55 lb single-spring or 73 lb dual-spring configuration
Chrome Silicon Vanadium steel spring construction
CNC-machined titanium retainers
14.4 mm maximum net valve lift
25 mm outer spring diameter
18 mm outer spring inside diameter
Performance upgrade for higher-RPM and performance-camshaft builds

Spring Pressure & Lift Specifications

Single Spring – 55 lb

Seat pressure: 55 lb @ 35.4 mm
Open pressure: 130 lb @ 10.5 mm lift
Spring rate: 7.6 lb/mm
Maximum net lift: 14.4 mm
Coil bind: 21 mm

Dual Spring – 73 lb

Seat pressure: 73 lb @ 35.4 mm
Open pressure: 202 lb @ 10.5 mm lift
Spring rate: 12.6 lb/mm
Maximum net lift: 14.4 mm
Coil bind: 21 mm outer / 17 mm inner

Match spring pressure to the camshaft's required installed height and spring loads rather than choosing the higher-pressure configuration automatically.

Vehicle Fitment

Toyota Corolla — AE86

1983–1987: Trueno (JDM) / 4A-GE 16V
1983–1987: Levin (JDM) / 4A-GE 16V
1985–1987: GT-S (U.S.-Market) / 4A-GE 16V

Toyota MR2 — AW11 / MK1

1984–1989: JDM / 4A-GE 16V
1985–1989: U.S.-Market / 4A-GE 16V
1986–1989: JDM Supercharged / 4A-GZE 16V
1988–1989: U.S.-Market Supercharged / 4A-GZE 16V

Toyota Corolla / Sprinter — AE92 — Coupe

1987–1991: Corolla Levin / Sprinter Trueno (JDM) / 4A-GE 16V
1987–1991: Corolla Levin / Sprinter Trueno GT-Z (JDM) / 4A-GZE
1988–1991: GT-S coupe (U.S.-Market) / 4A-GE 16V

Required Configuration: Matching springs, retainers and seats for the 16-valve cylinder head. The dual kit requires the compatible smaller-diameter guide and seal arrangement.

Fitment Notes

The selected spring pressure and installed height must match the camshaft and cylinder-head configuration. Maximum lift alone is not a complete fitment specification.
The dual-spring kit requires compatible smaller-diameter valve guides and its matching seals. Valve guides are not included.
Spring, retainer, seal and valve-guide clearances must be compatible with the selected camshaft lift.
Not for factory AE86 SR5 4A-C, AE92 SR5 4A-F / 4A-FE, or 4A-GE 20-valve cylinder heads.

Product Specifications

Brand: Supertech
Product Type: Valve Spring & Titanium Retainer Kit
Engine: Toyota 4A-GE / 4A-GZE DOHC 16V
Available Designs: Single Spring / Dual Spring
Spring Material: Chrome Silicon Vanadium Steel
Retainer Material: Titanium
Outer Spring OD: 25 mm
Outer Spring ID: 18 mm
Maximum Net Lift: 14.4 mm
Valve Positions: Intake & Exhaust
Application: Complete 16-Valve Cylinder Head

Which Valve Spring Kit Should You Choose?

Single Spring – 55 lb — Best for a rebuild that does not need the dual kit’s extra guide changes

Choose the single kit when its installed-height and spring-load specifications match your camshaft. It provides the springs, titanium retainers and seats without the dual kit's additional guide-and-seal requirement.

Dual Spring – 73 lb — Best for a build whose camshaft requires the higher spring loads

Choose the dual kit when your camshaft requires its higher seat and open pressures. It includes matching seals, but the compatible smaller-diameter valve guides are a separate requirement.

Our Recommendation: Match the kit to the camshaft's required spring loads and the cylinder-head configuration. Choose the single kit when its specifications meet the build's needs, or the dual kit when the higher-pressure specification and required guide-and-seal setup are appropriate.

Available Configurations