I list the places I personally purchased items, google and find lower prices/alternatives!
1991 Audi 200TQ Uses a 12mm Upper Nut on the shock | Spring rates are personal choice
Parts
- Description | Part Number | Supplier | Quantity | Cost
- Snap Ring 2" | 1400-200 | Akron Bearing | QTY: 2 | $6.30
- Spring Coupler | EIB-SPACER250 | Summit Racing | QTY: 2 | $41.90
- Eibach Spring 6" x 2.5" - 550LB | EIB-06002500550 | Summit Racing | QTY: 2 | $131.90
- Bilstein Shock Rear | 24-020664 | PartsGeek | QTY: 2 | $257.05
- Coilover Nut for 2.5"ID Spring | A1-12460 | A1 Racing | QTY: 2 | $25.74
- Coilover Top Hat for 2.5"ID Spring | BRP603 | Bicknell Racing | QTY: 2 | $30.80
- 5" Coil Over Sleeve Rear 1.980"ID | A1-12451 | A1 Racing | QTY: 2 | $31.06
- Take Up Spring 2.5ID x4" 25LB | HYPCS100 | A1 Racing | QTY: 2 | $60.00
Total Cost for Part for Rear Coilovers: $584.75









I will update with a photo step - by - step for assembly at a later date.
Step #1: Replace factory Bilstein circlip with Akron Bearing Snap Ring Part#5100-200.


Step #2: Assemble coilover parts
I assembled mine as sleeve, perch, helper spring, coupler, spring, top hot, then reused the setup minus top spring perch off stock.

Here it is on the car

Order websites:
http://www.A1Racing.com
http://www.SummitRacing.com
http://www.akronbearing.com
http://www.bicknellracingproducts.com
http://www.partsgeek.com