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The HKS 87-93 Supra MK3 Downpipe is designed for the 1986-1993 Toyota Supra. Match manufacturer part number 3103-RT003, the complete vehicle or system configuration, dimensions, connections, and included components before ordering.
Key Features
- Mandrel-Bent 80mm Piping: Seamless bends maintain consistent diameter to minimize turbulence and maximize exhaust velocity.
- SUS304 Stainless Steel Construction: Full polished finish resists corrosion and heat for long-lasting durability under high exhaust temperatures.
- High-Flow Design: Eliminates restrictions from stock catalytic converter section for improved scavenging and turbo efficiency.
- Complete Hardware Kit: Includes gaskets, flange nuts, bolts, and O2 sensor bung adapter for straightforward installation.
- Constructed from full SUS304 stainless steel with an 80mm (3-inch) mandrel-bent diameter for optimal flow.
- Typical dyno-tested improvements include 10-15 wheel horsepower plus faster turbo spool by 200-300 RPM when paired with a tune.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 1986-1993 | Toyota | Supra | Confirm engine, body style, system configuration, and exact interface |
Specifications
| Brand | HKS |
|---|---|
| Manufacturer Part Number | 3103-RT003 |
| Product Type | Downpipes |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new HKS downpipes identified by manufacturer part number 3103-RT003, in the quantity stated by the title. Additional wiring, pipes, hoses, clamps, fittings, gaskets, fluids, tuning, tools, and installation hardware are included only when expressly listed for this exact part number.
About HKS
HKS develops exhaust, forced-induction, cooling, engine, electronics, and exterior components for import and performance vehicle applications.
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Frequently Asked Questions
How do I confirm this HKS part is correct?
Match the exact manufacturer part number, dimensions, material, finish, quantity, electrical requirements, and connection or mounting interface before ordering.
Is this a complete kit?
Only the components stated in the title and What’s Included section are supplied. Related wiring, fittings, hoses, clamps, sensors, tools, or hardware may be sold separately.
Can this part be used in a custom application?
Universal parts may work when every dimension and interface is verified. Vehicle-specific or system-specific parts should not be treated as universal without current manufacturer confirmation.
Installation Instructions
Follow the current HKS instructions and the vehicle service manual for part number 3103-RT003. Compare every component, connection, dimension, and mounting point before disassembly. Use the correct tools, fasteners, torque values, fluids, wiring protection, and safety procedures, then inspect for leaks, interference, heat exposure, clearance, and secure operation before normal use.
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