Honda Civic 1.5T Turbo (2016-2023) | EX • LX • Sport • Si

Unleash the Full Potential of Your 1.5T Turbo

Take your Honda Civic's performance to the next level with the SPDZ1 2.5" Catless Downpipe & Front Pipe. Engineered specifically for the 2016-2023 Honda Civic 1.5L Turbo platform, this complete turbo-back upgrade dramatically improves exhaust flow by replacing the restrictive factory catalytic converter and front pipe.

Manufactured from premium stainless steel and precision TIG welded, the SPDZ1 downpipe is built to withstand extreme temperatures while delivering improved turbo spool, quicker throttle response, and a deep, aggressive exhaust tone.

Whether you're running a stock turbo or planning future performance upgrades, this is one of the most effective bolt-on modifications available for the L15B7 engine.

Why Choose SPDZ1?

Unlike restrictive OEM components, the SPDZ1 system is designed to maximize exhaust flow immediately after the turbocharger, allowing exhaust gases to exit more efficiently.

Benefits Include:

✔ Faster Turbo Spool

✔ Improved Throttle Response

✔ Reduced Turbo Backpressure

✔ Increased Horsepower Potential

✔ Increased Torque

✔ More Aggressive Exhaust Tone

✔ Improved High-RPM Performance

✔ Better Exhaust Flow for Tuned Vehicles

✔ Precision CNC Flanges

✔ Premium TIG-Welded Construction

✔ Mandrel Bent 2.5" Stainless Steel Tubing

✔ Direct Bolt-On Installation

Premium Construction

Every SPDZ1 downpipe is manufactured using high-quality stainless steel for exceptional durability and corrosion resistance.

Features

• Premium Stainless Steel Construction
• Full 2.5" Mandrel Bent Tubing
• Precision TIG Welds
• CNC Machined Flanges
• High-Strength Mounting Hardware Included
• O2 Sensor Bung
• Direct OEM Replacement Design
• Built to Handle High Boost Applications

Performance Gains

Replacing the restrictive factory catalytic converter and front pipe allows the turbocharger to operate more efficiently.

Typical benefits include:

• Faster Turbo Response
• Stronger Mid-Range Power
• Improved Top-End Performance
• Increased Turbo Efficiency
• Lower Exhaust Backpressure
• More Aggressive Exhaust Sound

Actual horsepower gains will vary depending on supporting modifications and ECU tuning.

Vehicle Fitment

Fits:

• 2016 Honda Civic 1.5T EX
• 2016 Honda Civic 1.5T LX
• 2016 Honda Civic 1.5T Touring
• 2016 Honda Civic 1.5T Sport
• 2017 Honda Civic 1.5T EX
• 2017 Honda Civic 1.5T Sport
• 2017 Honda Civic Si
• 2018 Honda Civic 1.5T EX
• 2018 Honda Civic 1.5T Sport
• 2018 Honda Civic Si
• 2019 Honda Civic 1.5T EX
• 2019 Honda Civic Sport
• 2019 Honda Civic Si
• 2020 Honda Civic 1.5T EX
• 2020 Honda Civic Sport
• 2020 Honda Civic Si
• 2021 Honda Civic 1.5T EX
• 2021 Honda Civic Sport
• 2021 Honda Civic Si
• 2022 Honda Civic Si*
• 2023 Honda Civic Si*

Please verify your vehicle before ordering.

What's Included

• SPDZ1 2.5" Catless Downpipe
• SPDZ1 2.5" Front Pipe
• Installation Hardware
• Required Gaskets
• O2 Sensor Bung(s)

Installation

• Direct Bolt-On Design
• No Cutting or Welding Required
• Uses Factory Mounting Locations
• Professional Installation Recommended

Tuning Information

While the vehicle can physically operate with this downpipe installed, an ECU tune is strongly recommended to maximize performance and reduce the likelihood of catalyst efficiency fault codes (Check Engine Light).

Off-Road Use Notice

This product is intended for closed-course competition and off-road use only.

It is not legal for installation on pollution-controlled vehicles in many states or countries. Please verify your local emissions regulations before purchasing.

Why Buy SPDZ1?

At SPDZ1, we engineer products with one goal in mind: deliver premium performance without the premium price tag. Every product is designed for enthusiasts who demand exceptional fitment, reliable performance, and long-term durability.

SPDZ1 Performance

• Premium Materials
• Precision Manufacturing
• Enthusiast-Tested Designs
• Performance You Can Feel
• Backed by Speedzone's 27+ Years of Automotive Experience

PREORDER ITEM, NEXT DELIVERY MID SEPTEMBER 2026