Below is a list of rear stabilizer bars for 1992 and later crown victorias.

Part Number	Diameter (mm)	Year Range	Comments	Suggested Retail
3W1Z-5A772-AA	15.0	03-	Base Suspension	$59.98
F0VY-5A772-A	17.0	92-97	Used on 1990 towncars & 92-97 crownvics. Type-S.	Obsolete
F8AZ-5A772-AA	17.0	98-00	Police & CNG. (Superceded by YW7Z-5A772-AA) (Used on base 98-00 towncars too)	Superceded by YW7Z-5A772-AA
YW7Z-5A772-AA	17.0	01-	Includes 2 insulators	$72.15
F1VY-5A772-A	17.8	92-	Type-S (Used on all 91-97 towncars and also 98+ limos)	$48.32
F3AZ-5A772-A	21.0	93-00	Handling Package. Type S/H	Obsolete
YW7Z-5A772-CA	21.0	01-	Handling Package (Used on 2003 & 2004 mercury marauders too)	$56.65

Below is a list of rubber insulators that connect the rear axle to the stabilizer bar

Part Number	Diameter	Years	Comments	Suggested Retail
F0VY-5493-B	17.0	92-00		??Obsolete??
6W1Z-5493-C	17.0	01-	Supercedes YW7Z-5493-AB	$13.32
F1VY-5493-C	17.8	92-		$26.65
YW7Z-5493-CA	21.0	93-	Supercedes F2AZ-5493-B	$11.65

Below are the rear stabilizer link and bracket part numbers

Part Number	Years	Comments	Suggested Retail
F0VY-5486-A	92-02	Rear Stabilizer Bar Bracket (Fits all 17, 18, and 21mm bar insulators)	Superceded by 3W1Z-5486-AA
N605907-S440	92-	Bolt M8 x 1.25 x 33 Hex Flng Pil (Supercedes: N605907-S2 N605907-S309)	$6.48
N808043-S56	92-	Nut M8 x 1.25 U P/T (Supercedes N800911-S55)	$11.00
3W1Z-5486-AA	03-04	Rear Stabilizer Bar Bracket	$6.65
6W1Z-5664-AA	92-	Rear Stabilizer Bar Link (Does not include nuts) (Supercedes: F1VY-5664-A)	$15.00
N621941-S441	92-	Nut & Washer M8 x 1.25 Hex (Supercedes: N621941-S36 N621941-S427)	$8.00

Notes:

• Many 2000 and later civilian crown vics and grand marquises do not have a rear stabilizer bar. All crown vics with the police and civilian handling package do have rear bars though. If in doubt whether your car has a rear bar or not, take a look under the car.
  
• Police rear swaybars are 17mm. Police coil springs are very stiff.
• Civilian Handling Package rear swaybars are 21mm but they are coupled with the relatively low rate civilian rear air springs
• All lincoln 1992+ towncars have rear air springs.
  
• Bigger is not always better. Have an understanding of the concepts of oversteer & understeer before "upgrading" sway bars.
• 1991 & prior "box bodies" used a different rear swaybar setup than later models and these bars are NOT interchangeable. Additionally, to add a rear sway bar onto a 1991 or prior "box body", one would need a 1991 or prior swaybar and also would have to replace the lower control arms with ones that had holes drilled in them for the swaybar mounts (i.e. police control arms). On 1992 and later models, the rear endlinks connect directly to the vehicle's frame rather than the lower control arms.
  

17mm = 0.663in
18mm = 0.708in
21mm = 0.827in

www.p71interceptor.com