Exhaust Manifold · SKU 701807501249
T3 STAINLESS RACING TURBO MANIFOLD EXHAUST FOR 97-06 A4 B5 B6/1.8T Sedan 4-Door
A T3 stainless racing turbo manifold exhaust for 1997-2006 Audi A4 B5 B6 1.8T sedan 4-door. It is a tubular design made from 304 polished stainless steel, built to match the factory routing and replace the stock manifold. The kit includes a 38mm/35mm external wastegate port and flange. It ships as a complete unit with a CNC machined flange and is designed for bolt-on installation.
- Material304 Polished Stainless Steel
- SurfacePolished
- SizeT3/T4 Configuration
- FlangeCNC machined
What You Get
Key Benefits
- 304 polished stainless steel resists heat and corrosion better than cast iron manifolds
- Tubular design maintains equal exhaust flow from each cylinder for balanced engine output
- Computerized mandrel bending ensures smooth internal surface and consistent bore size
- CNC machined flange provides a flat sealing face to prevent leaks under boost
- 38mm/35mm external wastegate port and flange included for direct turbocharger integration
Why Buyers Switch
Problems It Solves
- Stock cast iron manifolds crack under repeated heat cycling and high boost
- Poorly designed universal manifolds require welding and custom fitting
- Inconsistent flow between cylinders reduces turbo spool and engine efficiency
- Missing or undersized wastegate ports limit boost control and tuning flexibility
Where It Is Used
Application Scenarios
- Performance shops upgrading 1.8T A4 B5 B6 engines for improved turbo response
- Distributors stocking vehicle-specific turbo manifolds for the 1997-2006 Audi A4 market
- Tuning shops installing bolt-on manifolds without welding or custom fabrication
- Online sellers needing a high-res photographed part with a clear fitment list
Buyers
Who It Is For
- Performance parts distributors buying A4 B5 B6 1.8T hard parts by the pallet
- European car accessory wholesalers serving Audi 1.8T owners in North America
Construction
Technical Features
- Tubular 304 polished stainless steel construction with computerized mandrel bending
- CNC machined flange with flat sealing face for leak-free turbo connection
- 38mm/35mm external wastegate port and flange included in the kit
- Bolt-on replacement with factory routing and mounting points
- TIG welded joints for strength and durability under high exhaust temperatures
Data
Specifications
| Material | 304 Polished Stainless Steel |
|---|---|
| Surface | Polished |
| Size | T3/T4 Configuration |
| Flange | CNC machined |
| Wastegate Port | 38mm/35mm External |
| Package | 1x Manifold Kit |
| Exclusion | Does not fit A4 B5 B6 1.8T Cabriolet or Quattro models |
Material
Materials
- 304 polished stainless steel tube
- CNC machined flange
- 38mm/35mm external wastegate flange
Manufacturing
How It Is Made
Tube bending using computerized mandrel bender to match factory routing
CNC machining of flange for flat sealing face and precise bolt hole alignment
TIG welding of flange to tube with full joint penetration
Polishing of exterior and interior surfaces to a uniform finish
Final fit check against factory mounting points and turbo interface
Checks
Quality Control
- Flange bolt pattern and sealing face checked before welding
- Weld seams inspected for pinholes and incomplete fusion
- Surface checked for polishing defects and handling marks before packing
Private Label
Customisation Options
- Private label packaging and barcode labels on request
- Bulk cartons available for container orders instead of individual retail boxes
Comparison
Compared With The Alternatives
| Factory cast iron manifold | The stock manifold is heavier and prone to cracking under high boost; this one uses 304 stainless for better heat resistance and longevity |
|---|---|
| Universal tubular manifold | A universal kit requires cutting, welding, and fitting; this one bolts on without modification |
| Aftermarket cast manifold | Cast manifolds are heavier and less durable under repeated thermal cycling; this one uses welded tubular construction for strength |
Installation
Use Guide
- Confirm the vehicle is a 1997-2006 Audi A4 B5 B6 1.8T sedan 4-door and not a Cabriolet or Quattro model
- Let the engine cool completely before removing the factory manifold
- Replace the factory gasket and use a new turbo inlet gasket to prevent leaks
- Torque flange bolts evenly in a cross pattern to maintain sealing face flatness
- Recheck torque after the first heat cycle to ensure no relaxation
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Answers
Questions About This Part
Will this fit a 2004 Audi A4 B6 1.8T Quattro?
No. The part is designed for 1997-2006 A4 B5 B6 1.8T sedan 4-door models and does not fit Quattro or Cabriolet variants.
What size is the wastegate port?
The wastegate port is 38mm/35mm external. The flange is included in the kit.
Is the flange included or do I need to buy one separately?
The CNC machined flange is already fitted. The manifold ships as a complete unit.
What material is used and why does it matter?
304 polished stainless steel is used for its resistance to heat, corrosion, and cracking under repeated thermal stress.
What is included in the package?
One complete manifold kit with a CNC machined flange and a 38mm/35mm external wastegate port and flange.
Can we get our own brand on the box?
Yes. Private label packaging and barcode labels can be arranged, and bulk cartons are available for container orders.
Is this street legal where I sell?
We make no emissions approval claim for this part. Check your local regulations before resale.
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