Vendor:Speedzone Performance LLC
SPDZ1 K Series Header Downpipe 12-15 Civic Si & 13-15 Acura ILX Stainless Bellmouth
SPDZ1 K Series Header Downpipe – 2012–2015 Honda Civic Si / 2013–2015 Acura ILX K24 (9th Gen)
Unleash the full potential of your K24 with the SPDZ1 K Series Header Downpipe, engineered for maximum flow, durability, and performance. Designed for 9th Gen Civic Si and Acura ILX models, this header downpipe eliminates factory restrictions to deliver serious horsepower and torque gains, faster turbo response, and a more aggressive exhaust note.
Crafted from 304 stainless steel with mandrel-bent tubing and CNC-machined flanges, the SPDZ1 downpipe guarantees strength, precision, and long-lasting reliability. The OEM-style 4” cast bellmouth with a 3” outlet ensures optimal exhaust velocity, while the integrated flex pipe reduces stress under high-performance driving.
Installation is a breeze with its direct bolt-on design, fitting seamlessly to the factory cat-back exhaust or aftermarket systems—no modifications required. Equipped with O2 and wideband sensor ports, plus a 90° O2 spacer and included gaskets/hardware, this kit is ready for hassle-free installation.
Key Features:
✅ Fitment:
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2012–2015 Honda Civic Si (2-door & 4-door, 9th Gen)
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2013–2015 Acura ILX K24 (9th Gen)
✅ Performance: Increased horsepower, torque, and improved throttle response
✅ Construction: 304 stainless steel, TIG welded, mandrel-bent tubing
✅ Design: 4” cast bellmouth with 3” outlet for maximum exhaust flow
✅ Compatibility: Direct bolt-on to OEM or aftermarket cat-back exhaust
✅ Precision: CNC-machined manifold flanges for a perfect seal
✅ Flex Pipe: Reduces stress and vibration for longer system life
✅ Complete Kit: Includes gasket, hardware, O2 plugs, and 90° O2 spacer
✅ Warranty: Backed by a 1-year manufacturer warranty
Built to the SPDZ1 Racing Standard, this header downpipe is the ultimate upgrade for Civic Si and ILX owners looking for affordable performance, superior fitment, and race-ready reliability.
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SPDZ1 K Series Header Downpipe 12-15 Civic Si & 13-15 Acura ILX Stainless Bellmouth
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FAQs
Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like Turbo Tech Performance. Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.