If your Mustang has been fitted with GT 40 OR GT 40P Heads then you will probably need the spark plugs
| BUICK | 1985-2007 |
| CADILLAC | 1992-2007 |
| CHEVROLET | 1976-2003 |
| FORD | 1978-2013 |
| GMC | 1996-2002 |
| ISUZU | 1998-2000 |
| LINCOLN | 1991-2010 |
| MAZDA | 1994-2010 |
| MERCEDES-BENZ | 1986-1993 |
| MERCURY | 1979-2008 |
| MERKUR | 1985-1987 |
| OLDSMOBILE | 1985-2003 |
| PANOZ | 1999-2007 |
| PEUGEOT | 1987 |
| PONTIAC | 1985-2005 |
| QVALE | 2001 |
| SHELBY | 1999-2000 |
| ACDELCO R42LTS Specifications | |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel Alloy |
| Ground Electrode Core Material | Nickel |
| Height (IN) | 0.7 |
| Hex Size (IN) | 5/8 |
| Length (IN) | 3 |
| Manufacturer Heat Range | 2 |
| Pre-Gap Size (IN) | 0.04 |
| Pre-Gap Size (MM) | 1.12 |
| Reach (IN) | 0.68 |
| Reach (mm) | 17.25 |
| Resistor Type | Yes |
| Seat Type | Tapered |
| Thread Diameter (IN) | 0.55 |
| Thread Diameter (MM) | 14 |
| Weight (lb) | 0.1 |
| Width (IN) | 0.7 |
