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Price: $100
Location: Bend Oregon


2002 Underground

Our passion is pushing the boundaries and possibilities of bolt on performance parts for BMW 2002s.  

2002 Underground exists to address the weak points in the drivetrain when more horsepower and torque are added.



Our flagship product is the custom rear Subframe built from scratch to fit the BMW 2002 and equip it with a BMW e30 medium case “188” differential. This is an all-new Subframe supplied with new custom halfshafts and built in toe and camber adjustments.  We were the first to introduce this product in small production runs to the BMW 2002 community in January of 2011 on the FAQ website.

Shipping and PayPal fees are included in the lower 48 states.

Rear Subframe:  #02UG001  $1,935.00 US

Complete Bolt in Rear Subframe Kit:

1.    1 new Subframe for E30 188 differential, set up for camber/toe adjustments.

2.    4 new trailing arm eccentric adjusting bolts and washers.

3.    1 new differential cover-hanging bracket.

4.    1 new differential cover spacer.

5.    4 grade 5 carriage bolts

6.    2 new custom 4340 chromoly halfshafts.

7.    2 rebuilt 5 Series CV joints.

8.    2 new 5 Series CV boot kits.

9.  2 rebuilt 2002 CV joints.

10.  2 new 2002 CV boot kits.

11.  24 new CV bolts.

(Items 1,3, are Powdercoated)

(Items 6 through 10 are assembled and ready to install.)





Custom Rear Trailing Arms #02UG002  $3,230.00 US ( OUT OF STOCK )                      

New beefy trailing arms for your High HP. BMW 2002

 Made from 4130 chromoly tubing and flat stock.

1.     New 4340 chromoly 31 spline stub axles.

2.     New 4340 chromoly 31 spline hubs.

3.     New oversized wheel bearings 1 per side.

4.     Can be setup for 4x100 or 5x120 wheels.

5.     Adjustable spring perch (removable if using coil-overs).

6.     Built for standard shock or coil-overs.

7.     Uses BMW disc brakes with drum parking brake.

8.     Brake parts and bushings are not included (can be ordered separately) 

9.     These will also fit with a stock Subframe without changing the track width.

10.   Halfshafts are extra when using the stock Subframe.

Due to the cost of the trailing arms, deposits are required to start production. 




2002 Haus M20 Motor Mounts #02UG003  $310.00 US

The kit includes:

1.     2 Powdercoated Motor mounts.

2.     2 Motor mount rubber bushings.

3.     4 Metal support plates (to be welded onto Subframe.)

4.     1 Center track rod to clear transmission.



This kit requires modification to the front Subframe by the customer or can be sent in to 2002 UNDERGROUND for modification and powdercoating.


Modifying Your Front Subframe #02UG004  $525.00 US

This price includes:

1.     Modifying the Subframe.

2.    Sandblasting and powdercoating.

3.     Return shipping.



Shown with Transmission Mount and Center Bearing Support.


Getrag 260 Transmission Mount  #02UG005  $125.00 US

The kit includes:

1.     1 Powdercoated Transmission metal Bracket.

2.     2 Metal Supports with Nuts and Bolts.

3.     2 Rubber Transmission Bushings.


Driveshaft center bearing support:  #02UG006  $110.00 US

The kit includes:

1.     1 Powdercoated Driveshaft metal bracket.

2.     2 each Nuts, Bolts, and fender washers.


This center-bearing bracket is designed to be used in conjunction with the e30 differential, Getrag 260 transmission, and the m20 engine.  The stock e30 driveshaft from a 5spd mid production year 1988 and newer can be used without any modifications.  Older driveshafts may fit but have not been tested.  The part number of the driveshaft is #26101226733.



Custom direct replacement BMW 2002 Fuel Cells.  Built to order.



Edited by Ken
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If you are looking to use the stock or e21 differential, I would think you could find a good used rear subframe.  If you want to go with a e30 medium case differential, we would be happy to help.

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