SPDZ1 K Series Megaphone Header Downpipe 12-15 Civic Si FG & 13-15 Acura ILX Cast Bellmouth
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
SKU: SPDZ1-SZY-176
SPDZ1 K-Series Performance Header Downpipe for 2012–2015 Honda Civic Si & 2013–2015 Acura ILX K24
Unleash the full power of your K-Series engine with the SPDZ1 Performance Header Downpipe — the ultimate bolt-on upgrade for your 9th Gen Civic Si or Acura ILX K24. Designed for enthusiasts who demand more than just an OEM replacement, this downpipe is engineered to increase horsepower, improve throttle response, and deliver a raw, aggressive exhaust note — all while maintaining perfect fitment and durability.
Key Benefits:
- Big Gains, No Compromises: Unlock real horsepower and torque increases by eliminating factory restrictions and optimizing exhaust flow.
- Precision-Built Performance: Crafted from premium 304 stainless steel with mandrel-bent tubing and CNC-machined flanges for maximum durability and a perfect, leak-free seal.
- OEM-Style Fitment, Race-Proven Function: Features a cast 4” bellmouth collector with 3” outlet, designed to bolt directly to your factory or aftermarket cat-back system — no modifications required.
- Daily Driven, Track Ready: Whether you’re carving corners on the weekend or commuting daily, the integrated flex pipe absorbs vibration and movement, preventing stress on your exhaust system.
- Sensor-Ready Out of the Box: Comes with both O2 sensor and wideband sensor bungs pre-installed for easy tuning and monitoring.
- Megaphone Header Design: Enhances exhaust scavenging and improves mid-to-high RPM power for a more exhilarating driving experience.
What’s Included:
- 1x SPDZ1 K-Series Header Downpipe
- 3-Bolt Exhaust Gasket & Hardware Kit
- Pre-installed O2 & Wideband Sensor Ports
- Integrated Flex Section for Longevity
Vehicle Compatibility:
- 2012–2015 Honda Civic Si (FG4)
- 2013–2015 Acura ILX K24
Why Choose SPDZ1?
SPDZ1 is committed to pushing the boundaries of performance. Our products are developed in partnership with top-level tuners and tested under real-world and track conditions. Every SPDZ1 part is backed by our passion for motorsport, quality, and customer satisfaction.
Our History
For 23 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.