1991 Mercury Grand Marquis Fuel Cap Tester Adapter
Navigate our online catalogue to find original replacement Fuel Cap Tester Adapters specifically designed to fit a 1991 Mercury Grand Marquis.








Fuel Cap Tester Adapter
$19.84
Limited Stock
Ships: Wednesday Oct. 1st
Pick-Up: Ready in 2-3 Hours Tuesday Sep. 30th
Pick-Up: Ready in 2-3 Hours Tuesday Sep. 30th
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);







Fuel Cap Tester Adapter
$19.84
Limited Stock
Ships: Wednesday Oct. 1st
Pick-Up: Ready in 2-3 Hours Tuesday Sep. 30th
Pick-Up: Ready in 2-3 Hours Tuesday Sep. 30th
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Made in USA
Vehicle fitment:
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Vehicle Fitment Notes:
Black Adapter attached Stant tester 12300 and/or 12400
Black Adapter attached Stant tester 12300 and/or 12400







Fuel Cap Tester Adapter
$33.34
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);







Fuel Cap Tester Adapter
$33.34
Out of Stock
Condition: New
Required Per Vehicle: 1
Required Per Vehicle: 1
Vehicle fitment:
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Engine Base: 5.0L 302ci V8 (4.00x3.00; 101.6x76.2);
Vehicle Fitment Notes:
Adapter used with Stant tester 12300 and/or 12400 Purple
Adapter used with Stant tester 12300 and/or 12400 Purple