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The MTS Street E21 Inox is a height-adjustable send-in kit (coilover) from MTS Technik for the BMW E21 Sedan, model years 1975 to 1984. Street is the standard setup from MTS Technik: a good balance between comfort and firmness.

On the Inox version, the damper bodies are made of stainless steel, so road salt and moisture don’t stand a chance. This is a send-in kit: MTS Technik builds the kit with your own original front struts, so you don’t have to weld anything yourself.

Key benefits

• Stainless steel damper bodies, resistant to road salt and moisture
• Lower by 20 to 90 mm, front and rear independently adjustable
• Eibach springs of 60 N/mm front and 35 to 60 N/mm rear
• Gas-oil twin-tube dampers that stay stable even under intensive use
• hexaCOIL spring perch: the adjusting nut does not seize up during adjustment
• Front camber plates included, so you can adjust the camber
• TÜV certificate and 2 year warranty with no mileage limit

Suitable for

The MTS Street E21 Inox fits the following versions:

• 3 Series E21 Sedan (06/1975 to 03/1984): 315, 316, 318, 318i, 320, 320i, 323i

Note: axle load: maximum 815 kg front and maximum 870 kg rear; check your car’s vehicle type plate.

Technical specifications

• Product: MTS Street E21 Inox
• Manufacturer: MTS Technik
• Article number: XMTSGWBM83
• EAN: 5903855623002
• Version: Street, Inox (stainless steel)
• Type of kit: send-in kit, made using your own original front struts
• Lowering: front 20 to 90 mm, rear 20 to 95 mm
• Springs (Eibach): GWFE96 with 60 N/mm front, GWFE264HA with 35 to 60 N/mm rear
• Helper springs: GWHE01 (20 N/mm) and GWHE02 (20 N/mm)
• Height adjustment: front and rear via threaded damper body
• Front ride height: adjustable independently via the lower damper mounts
• Damper body for: diameter 45 mm
• Camber plates: included at the front
• Included: complete front and rear set with springs and height adjustment, plus front camber plates
• TÜV certificate: yes
• Weight: 36.9 kg
• Warranty: 2 years with no mileage limit

Fitting and delivery

MTS Technik builds the MTS Street E21 Inox with your own original front struts: after receipt they are stripped of their paint, welded to size and zinc-plated.

• The stated lowering applies relative to the standard suspension. If the car has a factory sport suspension, the lowering will be smaller.
• When fitting, check the clearance between tyre or wheel and the strut: at least 5 mm. If it is less, use approved wheel spacers.
• After fitting the MTS Street E21 Inox, have the wheel alignment checked, because camber and toe change as well.

How a send-in kit works

• After your order we will email you the shipping instructions and the address for your original front struts.
• Beforehand, remove all parts from the struts, such as hubs, bearings, cover caps, damper cartridges, bolts and nuts. If the struts arrive not disassembled, or if damage is found (for example broken bolts), they will be sent back or extra costs will be charged.
• Send in the struts in their original paint, even if it looks bad. Do not spray or paint them beforehand; they are stripped, welded and then zinc-plated.
• Because the kit is made to measure with your struts, the right of withdrawal for distance purchases does not apply: a send-in kit cannot be returned.
• This kit is only delivered within the European Union.

The delivery time depends on when your struts arrive. After your order we will keep you updated by email about the dispatch and the expected delivery time.

The MTS Street E21 Inox combines stainless steel damper bodies, Eibach springs of 60 and 35-60 N/mm and up to 90 mm of lowering for the BMW E21 Sedan.

Why choose the MTS Street E21 Inox?

With the MTS Street E21 Inox you choose the setup MTS Technik itself recommends as standard: enough lowering for a tight stance, and a character that doesn’t become tiring on the road. If you also drive in winter or the car is parked outside, the Inox version pays for itself: stainless steel doesn’t rust, so the thread of the height adjustment doesn’t seize up. If you mainly drive in summer, the Gold version is a more affordable alternative. With the included camber plates you set the camber, which with a large lowering means less tyre wear and more grip. And because it is a send-in kit, you don’t have to weld anything yourself.

Frequently asked questions

What is the difference between Gold and Inox?

Gold has steel damper bodies with a yellow zinc coating, Inox has stainless steel damper bodies. Inox is more resistant to road salt and moisture and therefore costs more. Otherwise, the kits are identical.

Can I return a send-in kit?

No. Because the kit is made to measure with your own struts, the right of withdrawal for distance purchases does not apply.

How long does delivery take?

The delivery time of the MTS Street E21 Inox depends on when your struts arrive. After your order we will keep you updated by email about the dispatch and the expected delivery time.

Other MTS Technik sets for the E21

• BMW E21 (75-84) MTS Technik coilover kit (45 mm strut, front camber plates, weld-in insert kit)
• BMW E21 (75-84) MTS Technik coilover kit (51 mm strut, front camber plates, send-in kit)
• BMW E21 (75-84) MTS Technik coilover kit (51 mm strut, front camber plates, weld-in insert kit)