APEXi GT Downpipe - 1986-1991 Mazda RX-7 FC3S (70mm)

Unlock power from your FC3S RX-7 with the APEXi GT Downpipe. Featuring 70mm diameter stainless steel construction, this downpipe dramatically improves exhaust flow over the restrictive factory unit. The result is proven power gains, improved turbo response, and enhanced exhaust sound - all with direct bolt-on fitment.

Key Features:

• 70mm (2.75") diameter for maximum flow
• Stainless steel construction for durability
• Direct bolt-on replacement for factory downpipe
• Proven power gains on FC3S RX-7
• Improved turbo response and spool
• Enhanced exhaust sound
• Premium APEXi quality and engineering
• Made in Japan

Performance Benefits:

• Proven Power Gains: Increased horsepower and torque throughout RPM range
• Improved Turbo Response: Reduced backpressure allows turbo to spool faster
• Better Flow: 70mm diameter eliminates factory restriction
• Enhanced Sound: Deeper, more aggressive exhaust note
• Direct Fitment: Bolt-on installation using factory mounting points
• Durable Construction: Stainless steel resists corrosion and heat

Specifications:

• Brand: APEXi
• Part Number: 145-Z001
• Product: GT Downpipe
• Diameter: 70mm (2.75 inches)
• Material: Stainless steel
• Installation: Direct bolt-on
• Made in: Japan

Fitment Information:

• Compatible Vehicles:
• 1986-1991 Mazda RX-7 FC3S (all models)
• 1986-1991 Mazda Savanna RX-7 FC3S (JDM)
• Engine: 13B-T rotary turbo
• Note: FC3S chassis only - does not fit FB (1979-1985) or FD (1993-2002) RX-7

What's Included:

• APEXi GT downpipe (70mm)
• Gaskets
• Mounting hardware
• Installation instructions

Installation Notes:

• Professional installation recommended
• Direct bolt-on - no cutting or modifications required
• Lift or jack stands required for access
• May require exhaust system adjustment for proper fitment
• Check local emissions regulations before installation

70mm Diameter - Maximum Flow:

The APEXi GT downpipe features a 70mm (2.75 inch) diameter throughout, which is significantly larger than the restrictive factory downpipe. This increased diameter dramatically reduces exhaust backpressure, allowing the turbo to spool faster and the engine to breathe better at high RPM. The result is measurable power gains and improved throttle response.

Stainless Steel Construction:

The downpipe is constructed from high-quality stainless steel that resists corrosion and withstands the extreme heat of the exhaust system. Stainless steel construction ensures the downpipe will last for years without rusting or deteriorating, even in harsh climates or with frequent track use.

Direct Bolt-On Fitment:

The APEXi GT downpipe is engineered specifically for the FC3S RX-7, providing direct bolt-on fitment using factory mounting points. No cutting, welding, or modifications are required. The downpipe connects to the factory turbo outlet and mates with the factory or aftermarket cat-back exhaust system.

Proven Power Gains:

APEXi's testing shows the GT downpipe delivers measurable power gains throughout the RPM range on the FC3S RX-7. The improved exhaust flow reduces backpressure, allowing the turbo to operate more efficiently and the engine to produce more power. The gains are especially noticeable in the mid-range and top-end where the factory downpipe becomes most restrictive.

Improved Turbo Response:

By reducing exhaust backpressure, the GT downpipe allows the turbo to spool faster and more efficiently. This translates to improved throttle response and reduced turbo lag, making the car feel more responsive and eager to accelerate. The improvement is immediately noticeable during daily driving and spirited runs.

Enhanced Exhaust Sound:

The larger diameter and free-flowing design create a deeper, more aggressive exhaust note compared to the factory downpipe. The sound is louder and more pronounced, especially under acceleration, giving your FC3S a more performance-oriented character. The sound is aggressive without being obnoxiously loud for street use.

Why APEXi?

APEXi has been manufacturing high-performance parts for Japanese vehicles for over 30 years. Their exhaust components are legendary in the JDM community, trusted by enthusiasts and professional tuners worldwide. Every APEXi product is engineered in Japan with a focus on performance, quality, and reliability.

FC3S RX-7 Platform:

The FC3S RX-7 (1986-1991) is an iconic Japanese sports car powered by the 13B-T turbocharged rotary engine. This lightweight, rear-wheel-drive platform is popular for street driving, drifting, and circuit racing. The APEXi GT downpipe is an essential upgrade for anyone looking to extract more performance from their FC3S.

Installation Tips:

• Lift vehicle or use jack stands for access
• Spray penetrating oil on exhaust bolts before removal
• Use new gaskets (included) for leak-free installation
• Torque all bolts to specification
• Check for exhaust leaks after installation
• May need to adjust exhaust hangers for proper alignment

Perfect For:

• FC3S RX-7 owners seeking proven power gains
• Turbo upgrades requiring improved exhaust flow
• Drift cars needing better turbo response
• Track cars requiring reduced backpressure
• Anyone upgrading from restrictive factory downpipe

Perfect For: FC3S RX-7 owners seeking proven power gains with APEXi's legendary GT downpipe featuring 70mm diameter and stainless steel construction.

Pro Tip: The improved exhaust flow makes this downpipe essential for turbo upgrades - it's one of the best bang-for-buck mods for FC3S.

FC3S Specific: Engineered specifically for 1986-1991 RX-7 FC3S with 13B-T rotary turbo engine.

Unlock power from your FC3S with APEXi GT downpipe - 70mm diameter, stainless steel, direct bolt-on, proven gains, improved turbo response, made in Japan.