Turbo Kit for Plymouth Neon 420A DOHC (1995-1999) 2.0L

Intercooled T3/T4 turbo kit for the 1995–1999 Plymouth Neon with the 2.0L DOHC 420A engine. It's built around a cast T3 manifold for the DOHC 420A head, a hybrid T3/T4 turbo with an internal wastegate, a front-mount intercooler and a full oiling kit. It does not fit the 2.0L SOHC Neon. A tune and fueling upgrades are required.

Why this kit

• Cast T3 manifold for the 420A DOHC with large primaries, thick flange and a design that carries the turbo's weight
• T3/T4 hybrid turbo with a .57 trim compressor and .50 / .63 A/R housings
• Bolt-on internal wastegate preset to 8 psi, with V-band flange and clamp
• Front-mount aluminum intercooler and full 2.5" piping kit
• Braided -3AN oil feed, high-temp return line and billet adapter plate included

Package Includes

• (1) T3/T4 hybrid turbocharger, oil fitting gaskets and mounting studs
• (1) Cast turbo manifold, T3 flange
• (1) Front-mount aluminum intercooler, 2.5" inlet / outlet
• (1) Internal wastegate kit, preset to 8 psi, V-band flange and clamp
• (1) Aluminum intercooler piping kit: (2) 2.5" straight pipes, (2) 90°, (2) 60°, (2) 45° bends, (2) 2.5" 90° silicone couplers, (6) 2.5" straight silicone couplers, (16) stainless worm-gear clamps
• (1) Turbo oiling kit: -3AN braided stainless oil feed line, 2 extra adapter fittings, CNC billet adapter plate, 18" 5/8" high-temp 550 psi oil return line, drain and feed gaskets, turbo gaskets and hardware
• (1) Blow-off valve kit with install kit

Turbocharger Specs

• Type: T3/T4 hybrid, wet-float bearings, balanced
• Compressor: .57 trim wheel, .50 A/R housing, 3" bellhorn inlet, 2" outlet
• Turbine: .63 A/R housing, T3 inlet flange, internal wastegate with V-band outlet
• Oil inlet: 1/8" NPT

Exact Fitment — Plymouth Neon

• 1995–1999 Neon with the 2.0L DOHC 420A: Sport, ACR, Expresso and Highline/Base coupe or sedan equipped with the DOHC engine
• Not for the 2.0L SOHC Neon (most 1995–1999 Base/Highline/Expresso and all 2000–2001 Plymouth Neons): different cylinder head
• Confirm "DOHC" on the cam cover before ordering
• Manual or automatic transmission

Not Included

• Chassis-specific downpipe and exhaust beyond the turbo
• Larger injectors, fuel pump and ECU tune
• Oil pan drain bung welding/tapping
• Boost controller and clutch upgrade
• Installation instructions

Installation Notes

• A tune is required. The 420A is naturally aspirated from the factory and needs fuel and timing control before running boost.
• Intercooler piping is a universal 2.5" kit — light trimming and routing to your car is expected.
• Plan a gravity-fed oil return; add a drain bung to the pan.
• The manifold is a street cast log, not equal-length tubular — strong and quick to spool, with a different top-end character than a header.
• Blow-off valve flanges can be welded where you prefer.
• Idle 30–60 seconds before shutdown to protect the turbo bearings.
• About +100 hp on a healthy stock engine at 8 psi with a proper tune. The 485 hp figure is a hardware ceiling at 25+ psi with a built motor and supporting mods, not a dyno result.
• Professional installation recommended.

FAQs

Will this fit my 2000 Neon?
No. 2000–2001 Plymouth Neons use the SOHC 2.0L. This kit is for the 1995–1999 DOHC 420A.

How do I know if my Neon is DOHC?
The DOHC engine has a cam cover labeled DOHC. Your original window sticker or engine code also confirms it.

Can I keep A/C and power steering?
Most installs keep A/C and power steering; confirm clearance during mock-up.

Does it work with an automatic?
Yes — it fits manual and automatic cars with the DOHC 420A.

What else do I need?
A downpipe and exhaust, injectors, fuel pump, tune, oil pan drain bung and a clutch rated for the added power.