Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
The SPDZ1 RF V3 Big Tube 4-1 Header is engineered for performance-driven Honda enthusiasts running a B-Series engine swap. Designed to outperform stock manifolds and cheaply made alternatives, this header unleashes real horsepower, offers clearance for A/C and power steering, and fits like a glove in your EG, EK, or DC2 chassis.
Whether you’re building a street sleeper or a track weapon, the SPDZ1 RF V3 brings race-inspired flow, premium build quality, and unmatched reliability — all backed by better flanges, stronger hardware, and superior packaging for peace of mind from checkout to install.
Key Features:
True 4-1 Big Tube Design: Built for mid-to-high RPM power, offering +10 WHP gains even on stock GSR motors — more with tuning and bolt-ons.
Full A/C & Power Steering Clearance: No compromises — run full accessories with zero interference.
18-Gauge 304 Stainless Steel: TIG welded, corrosion-resistant, and built to withstand daily driving or track abuse.
Thick CNC Machined Flanges: Heavy-duty flanges machined to spec and thicker than competitors for a warp-resistant seal.
True 2.5” Collector: For maximum exhaust flow and seamless integration with aftermarket exhaust systems.
Complete Hardware & Gasket Kit: Comes with everything you need for a clean, hassle-free install.
Protective Premium Packaging: Shipped in reinforced, custom-fit packaging to prevent shipping damage and ensure your product arrives flawless.
Designed to fit half size radiators, will not fit full size radiators
Vehicle Fitment:
1992–2000 Honda Civic (EG / EK w/ B-Series Swap)
1994–2001 Acura Integra (DC2)
Pre-1965 Chassis w/ B-Series Swap
Why SPDZ1?
SPDZ1 performance headers are built with track-tested precision and enthusiast-driven engineering. We don’t cut corners — we raise the bar. When quality, fitment, and performance matter, SPDZ1 delivers.
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
