Audi Coupe Quattro B2/B3/B4 Front and Rear Tubular Subframes

After extensive CAD development based on 3D scanning of OEM subframes, CAD FEA (Finite Element Analysis) testing, and road testing, you can now purchase brand new, rust-free subframes for your Audi Coupe Quattro. Utilizing the same T45 tubing found in WRC cars, our subframes provide increased stiffness and reduced weight. Additional control arm mounting points allow for adjustment of the control arms for a horizontal position when the car is loaded.

Characteristics:
- 7.2 kg, a 5.5 kg saving compared to the OEM front subframe
- 9.5 kg, a 3.5 kg saving compared to the OEM rear subframe
- T45 tubes (BS4T45 (+A2) to BS5T100 and BS6 S100) imported from Great Britain and S355 sheets
- all elements welded using the TIG method
- delivered painted (powder coated) in black or, on special request (+50 euros), in any color from the RAL palette
- adjustable swing arm height (-20 mm or + 20 mm compared to OEM) adjustment
- solid body mounts for increased stiffness and reduced weight
- includes front and rear stabilizer mounts
- front subframe for 6-speed gearbox mountings (01E)
- additional reinforcement for rear tie rods. OEM or aftermarket.
- can be used with OEM control arms or Audi Sport control arms
- attaches to OEM bodywork

What's included:
- front subframe
- rear subframe
- aluminum front and rear stabilizer mounting inserts with screws
- screws for attaching the subframe to the body
- wishbone bolts

Used in:
- Audi B2 Coupe Quattro 5-cylinder
- Audi UrQuattro
- Audi B3 80/90 Sedan/Coupe Quattro 5-cylinder
- Audi B4 80/90 Coupe Quattro 5-cylinder
- Audi S2 Coupé

T45 is a unique seamless carbon-based steel tube used in a variety of applications across industries. It is stronger than the Co-Mo 4130 inner tube also used in motorsports. It is widely used in the aerospace sector in equipment such as pilot and crew seats due to the materials' ability to withstand high G-forces without cracking or fracturing. This material is carbon-manganese-based and complies with full British Standards aerospace specifications.

Properties
Tensile strength: 700 – 900 MPa,
Efficiency 0.2% Minimum 620 MPa
Hardness test: 201 min – 262 max HB or 210 min – 275 max HV.

Note: Sold exclusively for off-road, track, and racing applications. We strongly recommend that subframe installation be performed by a qualified and experienced workshop that knows what they're doing.