Cost Breakdown of a 450 Hp Rx-8 Ls Swap: from Engine to Exhaust Materials

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The RX-8 is a beloved sports car known for its unique rotary engine and agile handling. However, many enthusiasts choose to swap the rotary engine for a more powerful and reliable option, such as the LS V8 engine. This article provides a detailed cost breakdown of a 450 HP RX-8 LS swap, covering everything from the engine to the exhaust materials.

Overview of the LS Swap

An LS swap involves replacing the stock rotary engine of the RX-8 with a General Motors LS-series V8 engine. This swap is popular due to the LS engine’s power, reliability, and availability. The process requires various components and modifications to ensure compatibility and optimal performance.

Cost Breakdown

Engine Costs

The engine is the heart of the swap, and the LS engine selection can significantly affect the overall cost. Here’s a breakdown of the costs associated with the engine:

  • LS Engine (used) – $2,500
  • LS Engine (new) – $5,000
  • Engine mounts – $200
  • Oil pan – $150

Transmission Costs

Choosing the right transmission is crucial for handling the power of the LS engine. Here are the typical costs:

  • Transmission (T56) – $2,000
  • Transmission mount – $100
  • Driveshaft – $400
  • Clutch kit – $300

Fuel System Costs

Upgrading the fuel system is essential for supporting the LS engine’s fuel requirements. Here’s what to expect:

  • Fuel pump – $150
  • Fuel lines – $100
  • Fuel injectors – $400
  • Fuel pressure regulator – $80

Cooling System Costs

A proper cooling system is vital to prevent overheating. Below are the typical expenses:

  • Radiator – $300
  • Cooling fans – $150
  • Hoses and fittings – $100
  • Thermostat – $50

Exhaust System Costs

The exhaust system must be designed to handle the LS engine’s output while fitting within the RX-8’s chassis. Here’s a breakdown:

  • Headers – $600
  • Mid-pipe – $300
  • Cat-back exhaust – $500
  • O2 sensors – $100

Wiring and Electronics Costs

Integrating the LS engine with the RX-8’s electronics requires a proper wiring harness and other components:

  • Wiring harness – $600
  • ECU – $500
  • Miscellaneous sensors – $200

Labor Costs

If you’re not performing the swap yourself, labor costs can add up quickly. Here’s a general estimate:

  • Labor (10-20 hours) – $1,000 to $2,000

Total Estimated Costs

Based on the breakdown above, here’s a summary of the estimated costs:

  • Engine: $2,500 – $5,000
  • Transmission: $2,500
  • Fuel System: $730
  • Cooling System: $600
  • Exhaust System: $1,500
  • Wiring and Electronics: $1,300
  • Labor: $1,000 – $2,000

When totaled, the estimated cost of an RX-8 LS swap can range from approximately $10,130 to $14,630, depending on the choices made regarding the engine and whether labor is included.

Conclusion

The RX-8 LS swap is a popular modification that can dramatically enhance the car’s performance. While the costs can vary based on numerous factors, understanding the breakdown of expenses allows enthusiasts to budget effectively. Whether you choose to tackle the swap yourself or hire professionals, the result is a powerful and thrilling driving experience.