Autolite APP26

Spark plug Autolite APP26 for Chevrolet and GMC small/big block V8, V6 and 250 inline six, Buick, Oldsmobile, Pontiac, Ford V8, Dodge and Plymouth 225 Slant Six engines, 1968–1993. Autolite Double Platinum plug with 14 mm tapered seat – longest-life equivalent of R45TS.

• Thread14 mm
• Seattapered (no gasket)
• Reach0.433" (11 mm)
• Hex5/8" (16 mm)
• Resistoryes
• Heat range7 (Autolite)
• Electrodedouble platinum (centre and ground)
• Sold as1 piece

Fits

• Chevrolet – 200 (3.3 L) V6: 1978–79 · 229 (3.8 L) V6: 1980–84 · 230 (3.8 L) L6: 1970 · 231 (3.8 L) V6: 1980–81 · 250 (4.1 L) L6: 1970–84 · 262 (4.3 L) V8: 1976 · 262 (4.3 L) V6: 1987–90 · 267 (4.4 L) V8: 1979–82 · 305 (5.0 L) V8: 1976–85, 1987–93 · 307 (5.0 L) V8: 1971–73, 1981–85, 1987–90 · 350 (5.7 L) V8: 1971–85, 1987–92 · 400 (6.6 L) V8: 1971–80 · 402 (6.6 L) V8: 1970–72 · 452 (7.4 L) V8: 1973–74 · 454 (7.4 L) V8: 1972–80
• Pontiac – 200 (3.3 L) V6: 1978–79 · 229 (3.8 L) V6: 1980–81 · 230 (3.8 L) L6: 1970 · 231 (3.8 L) V6: 1978 · 250 (4.1 L) L6: 1970–71, 1976–79 · 262 (4.3 L) V6: 1985–87 · 267 (4.4 L) V8: 1979–82 · 301 (4.9 L) V8: 1978 · 305 (5.0 L) V8: 1976–85, 1987–92 · 307 (5.0 L) V8: 1970–71 · 350 (5.7 L) V8: 1971–74, 1976–79, 1988–92 · 350 (5.7 L) V8 (Pontiac): 1971–74, 1977 · 350 (5.7 L) V8 (Chevrolet): 1977–79 · 400 (6.6 L) V8: 1972–74 · 402 (6.6 L) V8: 1970–71 · 455 (7.5 L) V8: 1972–74
• GMC – 200 (3.3 L) V6: 1978–79 · 229 (3.8 L) V6: 1980–84 · 250 (4.1 L) L6: 1971, 1976–84 · 262 (4.3 L) V6: 1986–87 · 267 (4.4 L) V8: 1979–82 · 305 (5.0 L) V8: 1976–82, 1984–85, 1987 · 307 (5.0 L) V8: 1971 · 350 (5.7 L) V8: 1976–85 · 400 (6.6 L) V8: 1976–80 · 454 (7.4 L) V8: 1976–80
• Buick – 231 (3.8 L) V6: 1980–81 · 250 (4.1 L) L6: 1970–71, 1973–74 · 267 (4.4 L) V8: 1981–82 · 305 (5.0 L) V8: 1977–82, 1984–87, 1991 · 350 (5.7 L) V8: 1968–74, 1977–79 · 350 (5.7 L) V8 (Chevrolet): 1977–79 · 350 (5.7 L) V8 (Buick): 1978–79 · 400 (6.6 L) V8: 1968–69 · 430 (7.0 L) V8: 1968–69 · 455 (7.5 L) V8: 1970–74
• Ford – 255 (4.2 L) V8: 1981–82 · 302 (5.0 L) V8: 1976–85 · 351M (5.8 L) V8: 1976–81 · 351W (5.8 L) V8: 1976–81 · 400 (6.6 L) V8: 1976–78, 1980–82 · 460 (7.5 L) V8: 1973–78
• Mercury – 255 (4.2 L) V8: 1981–82 · 302 (5.0 L) V8: 1976–85 · 351M (5.8 L) V8: 1976–81 · 351W (5.8 L) V8: 1976–81 · 400 (6.6 L) V8: 1976–78 · 460 (7.5 L) V8: 1974–78
• Oldsmobile – 250 (4.1 L) L6: 1970–71, 1973–74, 1976 · 267 (4.4 L) V8: 1981–82 · 305 (5.0 L) V8: 1977–80, 1982–87, 1991–92 · 350 (5.7 L) V8: 1972, 1977–79 · 350 (5.7 L) V8 (Chevrolet): 1977–79 · 350 (5.7 L) V8 (Oldsmobile): 1977–79
• Checker – 229 (3.8 L) V6: 1980–82 · 250 (4.1 L) L6: 1970–74, 1976–79 · 267 (4.4 L) V8: 1980–82 · 305 (5.0 L) V8: 1977–81 · 350 (5.7 L) V8: 1971–74, 1976–79
• Excalibur – 305 (5.0 L) V8: 1980–89 · 350 (5.7 L) V8: 1971, 1986–89, 1993 · 454 (7.4 L) V8: 1972–79
• Lincoln – 302 (5.0 L) V8: 1977–85 · 351W (5.8 L) V8: 1977, 1980 · 400 (6.6 L) V8: 1977–79 · 460 (7.5 L) V8: 1974–78
• Dodge – 225 (3.7 L) L6: 1975–87
• Plymouth – 225 (3.7 L) L6: 1975–83
• Chrysler – 225 (3.7 L) L6: 1978–83
• Jeep – 350 (5.7 L) V8: 1968–71
• Stutz – 455 (7.5 L) V8: 1972–74
• Cadillac – 305 (5.0 L) V8: 1992 · 350 (5.7 L) V8: 1993

Interchange numbers

Other brands: ACDelco R45TS · Champion 7018 · NGK SUR45GP

OE numbers: GM 19158031

Manufacturer part number: Autolite APP26.