Exhaust Header · SKU 701807501744
Black Exhaust Header Fits Mazda RX-7 79-85 1.1L Exhaust Manifold
A black exhaust header kit for the 1979-1985 Mazda RX-7 1.1L, built from mid-steel with a 2.00 inch inlet and 2.50 inch outlet. It includes CNC machined flanges, studs, nuts, and flange gaskets. The header replaces the factory exhaust manifold and ships as a complete kit with all necessary hardware. Fitment is specific to the RX-7 1.1L model years and is not for highway use.
- MaterialMid Steel
- SurfaceBlack Powder Coat
- Inlet Size2.00 inch
- Outlet Size2.50 inch
What You Get
Key Benefits
- 2.00 inch inlet and 2.50 inch outlet improve exhaust flow and reduce back pressure
- CNC machined flanges ensure consistent sealing face flatness for leak-free operation
- TIG and MIG welded construction provides strong, durable joints
- Mandrel bent tubing maintains consistent bore size for better gas flow
- Studs, nuts, and metal gaskets included in the kit for immediate installation
- O2 sensor bung pre-installed with included metal gasket for sensor compatibility
Why Buyers Switch
Problems It Solves
- Factory exhaust manifolds restrict flow and limit engine breathing at high RPM
- Poorly made universal headers require cutting and welding, increasing labour cost
- Missing hardware like studs, nuts, and gaskets delays installation and causes fitment issues
- Non-mandrel bent tubing collapses under pressure, reducing flow efficiency
- Lack of O2 sensor bung and gasket forces aftermarket modifications
Where It Is Used
Application Scenarios
- Racing teams upgrading RX-7s for track use with proven performance gains
- Performance shops installing headers on classic RX-7s for engine tuning projects
- Distributors stocking vehicle-specific exhaust kits for vintage Japanese sports cars
- Online sellers needing a photographed, fitment-verified part with clear hardware inclusion
Buyers
Who It Is For
- Performance parts distributors buying vintage exhaust kits by the pallet
- Racing and track shops installing headers on classic RX-7s for competition
- Independent tuners working on 1979-1985 Mazda RX-7s with 1.1L engines
Construction
Technical Features
- Pair of exhaust headers with 2.00 inch inlet and 2.50 inch outlet
- CNC machined flanges with TIG and MIG welded construction
- Mandrel bent tubing for consistent bore size and smooth flow
- Includes studs, nuts, and metal flange gaskets
- O2 sensor bung pre-installed with included metal gasket
- Black powder coat finish for heat resistance and visual clarity
Data
Specifications
| Material | Mid Steel |
|---|---|
| Surface | Black Powder Coat |
| Inlet Size | 2.00 inch |
| Outlet Size | 2.50 inch |
| Flange | CNC machined |
| Construction | TIG and MIG welded |
| Bending | Mandrel bent |
| Package | 1x Pair Exhaust Header Kit |
| Exclusion | Not for highway use; not for sale or use in California |
Material
Materials
- Mid-steel tubing
- CNC machined flanges
- Studs, nuts, and metal flange gaskets
Manufacturing
How It Is Made
Tube bending to match factory routing with mandrel bending for consistent bore
Flange machining on CNC for precise bolt hole alignment and sealing face
TIG and MIG welding of flanges to headers for structural integrity
Powder coating application for heat resistance and corrosion protection
Final inspection of flange flatness and weld quality before packing
Checks
Quality Control
- Flange bolt holes checked for alignment and thread integrity
- Weld seams inspected for porosity and incomplete fusion
- Surface checked for coating defects and handling marks before packing
Private Label
Customisation Options
- Private label packaging and barcode labels on request
- Bulk cartons available for container orders
Comparison
Compared With The Alternatives
| Factory exhaust manifold | The stock manifold restricts flow and limits power gains; this header improves flow and increases horsepower and torque |
|---|---|
| Universal header kit | Universal headers require cutting and welding; this kit bolts on with included hardware and no modification |
| Mild steel aftermarket header | Mild steel is cheaper but less durable under high heat; mid-steel offers better strength and heat resistance |
Installation
Use Guide
- Confirm the vehicle is a 1979-1985 Mazda RX-7 with the 1.1L engine
- Do not install on vehicles registered for highway use
- Replace the factory manifold gasket with the included metal flange gasket
- Install studs and nuts before mounting the header to ensure proper alignment
- Torque all flange bolts evenly in a crisscross pattern to maintain sealing face flatness
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Answers
Questions About This Part
Is this header for highway use?
No. This product is for off-road, competition, or racing use only and is not intended for vehicles registered for highway use.
Can I use this on a 1986 RX-7?
No. The part is designed for 1979-1985 Mazda RX-7 1.1L models only.
What is included in the kit?
One pair of exhaust headers, studs, nuts, and metal flange gaskets. The O2 sensor bung is pre-installed with a metal gasket.
Is this legal in California?
No. This product is not for sale or use in California due to emissions regulations.
Do I need to cut or weld anything?
No. The header ships as a complete kit with all necessary hardware and bolts on directly.
Can I get private label packaging?
Yes. Private label packaging and barcode labels can be arranged. Bulk cartons are available for container orders.
What shipping options are available?
Domestic US orders ship via FedEx and arrive in 2-5 days. International orders ship via DHL Express. Shipping to Alaska, Hawaii, Puerto Rico, and PO Boxes incurs additional charges.
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