2004–2008 Mazda RX-8 13B Non-Turbo 4-Port Engine with 5-Speed Manual RWD Transmission – Complete Swap Package For Sale

If you’re rebuilding your RX-8 or replacing a failing rotary, J-Spec Auto Sports offers a clean 2004–2008 Mazda RX-8 13B-MSP Renesis 4-Port non-turbo engine, paired with a 5-speed manual RWD transmission.

This is a complete, matching rotary powertrain package — ideal for direct replacement or full drivetrain refresh.

Engine & Transmission Details

• Engine Code: 13B-MSP Renesis

• Configuration: 4-Port Rotary

• Aspiration: Naturally Aspirated (Non-Turbo)

• Displacement: 1.3L Rotary (13B)

• Transmission: 5-Speed Manual (5MT)

• Drivetrain: Rear-Wheel Drive (RWD)

• Application Years: 2004, 2005, 2006, 2007, 2008

• Condition: Used – Inspected

This setup is designed specifically for early RX-8 models equipped with the 4-port Renesis engine and 5-speed manual transmission.

What Makes the 4-Port 13B Renesis Unique?

The 4-port Renesis engine was used in base model RX-8 trims and is known for:

✔ Smooth power delivery
✔ Simpler port configuration
✔ Daily-driver reliability
✔ Balanced high-revving performance
✔ Lower complexity compared to 6-port versions

While the 6-port version produced slightly more horsepower, the 4-port setup is highly regarded for street reliability and straightforward maintenance.

Complete Engine & Transmission Combo

This listing includes both:

• 13B Renesis 4-Port Engine

• 5-Speed RWD Manual Transmission

Purchasing the engine and transmission together ensures:

✔ Matching drivetrain compatibility
✔ Simplified installation
✔ Reduced sourcing time
✔ Proper bellhousing alignment
✔ Factory gear ratio pairing

This makes it an excellent option for customers looking for a complete swap solution.

Direct Fitment For

• 2004 Mazda RX-8 (4-Port Models)

• 2005 Mazda RX-8 (4-Port Models)

• 2006 Mazda RX-8 (4-Port Models)

• 2007 Mazda RX-8 (4-Port Models)

• 2008 Mazda RX-8 (4-Port Models)

Always verify VIN and transmission compatibility prior to purchase.

Ideal For:

• Blown engine replacement

• Apex seal failure repair

• Compression loss replacement

• Full drivetrain refresh

• Rotary project builds

• Budget RX-8 restoration

If your RX-8 is experiencing low compression or flooding issues, replacing the full engine and transmission assembly is often the most efficient solution.

Why Choose a Rotary from J-Spec Auto Sports?

Rotary engines require careful handling and inspection. At J-Spec Auto Sports, we understand rotary platforms and properly inspect engines before listing.

We specialize in:

• JDM rotary engines

• Mazda RX-8 powertrains

• JDM performance motors

• Rare Japanese drivetrain components

Our goal is to supply properly sourced engines — not unknown-condition cores.

Condition & Notes

• Used engine and transmission

• Visual inspection performed

• Sold as complete long block assembly with matching 5MT

Compression specifics available upon request. Contact us for detailed photos and testing results.

Shipping Information

Due to size and weight, this engine and transmission combo will ship via freight carrier. Proper palletization and secure packaging are provided.

Local pickup may be available.

Keywords: Used JDM Mazda RX-8 Engine and Transmission, 13B Non-Turbo Rotary Engine, RX8 5-Speed Manual Transmission, 13B-MSP 4-Port Engine for Sale, JDM Mazda Rotary Engine, RX-8 Engine Swap, RX8 Engine Replacement J-Spec Auto