Hyundai Excel 1.5L G4EK Headers 1998–2001 – Wildcat WILD131

Wildcat WILD131 exhaust headers (extractors) are designed for selected Hyundai Excel models from 1998–2001 fitted with the 1.5L G4EK SOHC 12-valve petrol engine.

Featuring an interference-style header design for street performance applications, WILD131 uses 1.50" primary pipes, 1.75" secondary pipes and a 2.00" outlet. The performance pipework is designed to improve exhaust gas flow and scavenging, helping improve torque, throttle response and usable engine performance.

WILD131 is designed as a direct-fit replacement for the applicable factory exhaust manifold, making it a practical performance upgrade for standard and mildly modified Hyundai Excel applications.

Please check availability and current lead time before ordering.

Key Features

• Designed for selected Hyundai Excel 1998–2001 applications
• Suits the 1.5L G4EK SOHC 12-valve petrol engine
• Interference-style design for street performance applications
• 1.50" (approximately 38mm) primary pipes
• 1.75" (approximately 45mm) secondary pipes
• 2.00" (approximately 51mm) outlet
• Direct-fit application
• Designed to improve exhaust flow, torque, throttle response and engine performance

Construction

• Australian-made Wildcat performance headers
• Quality mild steel construction
• Strong welded construction for durability
• Heavy-duty cylinder-head mounting flange
• Heat-resistant painted finish rated to approximately 600°C

Additional Options

• Replacement exhaust manifold/header gasket where required
• Replacement manifold studs, nuts and exhaust hardware where required
• Performance exhaust system where further exhaust flow improvement is required

Vehicle Fitment

• Make: Hyundai
• Model: Excel
• Year Range: 1998–2001
• Engine: G4EK
• Engine Capacity: 1.5L
• Configuration: SOHC 12-valve petrol

Fitment Notes

• Designed for selected Hyundai Excel 1998–2001 models
• Suits the 1.5L G4EK SOHC 12-valve petrol engine
• Direct-fit application for the applicable standard vehicle configuration
• Vehicle modifications, engine conversions, engine mounts or non-standard exhaust systems may affect clearance and fitment
• Confirm the engine code and vehicle configuration before ordering
• Please check availability and current lead time before ordering.

What’s Included

• 1 x Wildcat WILD131 header / extractor assembly
• Outlet connection components as supplied

Recommended With

• New exhaust manifold/header gasket where required
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• High-temperature exhaust gasket sealant where appropriate
• Quality performance exhaust system where further exhaust flow improvement is required

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, a 1.5L four-stroke engine theoretically draws in approximately 3,000 litres of intake air per minute and can expel around 9,000 litres of hot exhaust gas per minute at approximately 600°C.

A well-designed header and exhaust system helps manage this high gas flow efficiently, reducing restriction and improving exhaust scavenging, torque, throttle response and engine performance.

Installation Tips

• Apply penetrating lubricant such as WD-40 or similar to the manifold studs, nuts and exhaust fasteners before removal
• Remove all traces of the old manifold gasket before installation
• Inspect the cylinder-head sealing surface, studs and threads before fitting the headers
• Use a new exhaust manifold/header gasket where required
• Trial-fit the header and check clearance before final tightening
• Protect the painted header surfaces during installation
• Check all exhaust connections for leaks after installation
• Inspect and re-tighten the mounting hardware after the initial heat cycles

Warranty & Compliance

Wildcat headers are covered by the applicable manufacturer's warranty subject to standard warranty terms and conditions.

Installation must retain the catalytic converter, oxygen sensors and any other emissions-control equipment required for the vehicle. Exhaust and emissions requirements vary between Australian states and territories, and the completed installation must comply with the regulations applicable in your state or territory.

FAQ

Which Hyundai Excel models does WILD131 suit?
WILD131 is designed for selected Hyundai Excel models from 1998–2001 fitted with the 1.5L G4EK SOHC 12-valve petrol engine.

Which engine does WILD131 suit?
WILD131 is designed for the 1.5L G4EK SOHC 12-valve petrol engine. Confirm your engine code before ordering.

Are WILD131 headers direct fit?
Yes. WILD131 is listed as a direct-fit application for the applicable standard Hyundai Excel configuration.

What size are the WILD131 header pipes?
WILD131 uses 1.50" primary pipes, 1.75" secondary pipes and a 2.00" outlet.

What finish is used on WILD131?
The headers have a heat-resistant painted finish rated to approximately 600°C.

Are WILD131 headers Australian made?
Yes. Wildcat WILD131 headers are manufactured in Australia.

Can I pick up from the store?
Yes. Pick up is available but must be pre-arranged before collection.

How much is freight?
Freight varies depending on your delivery location and where stock is available. Please contact us for freight charges before ordering. Where possible, we can arrange dispatch from the nearest available product location to help reduce freight costs and delivery times.

Do you ship to the USA?
Yes. Best Mufflers regularly ships exhaust systems and exhaust parts to customers throughout the United States.

Please note that import duties, tariffs, taxes, and customs clearance fees are not included in the product or shipping price. Once your order is processed and the applicable charges are calculated, we will send you a secure payment link to finalise the import duties and tariff charges before dispatch.

Customer Support

For phone orders, fitment advice or product enquiries, contact Best Mufflers:

Call Now: +61 2 9547 3511 Email Us

Best Mufflers
87A Planthurst Road, Carlton NSW 2218, Australia
Monday–Friday 8:00am–5:00pm by appointment
Exhaust Systems Since 1983