ACCEL 0414S-4 U-Groove Spark Plug Header Plug Features: Header-Box U-Groove Ground Electrode Five-Rib Aluminum Insulator Copper Core Nickel/Chrome Steel Electric Heat Seal Copper-Glass Gas-Tight Seal Less Flame Dissipation Height: 4.88 Width: 3.50 Length: 1.00 Weight: 7.00 lbs Fitment: 1990/Chevrolet/Caprice/Classic Wagon 4-Door/5.0L 307Cu. In. V8 GAS OHV Naturally Aspirated::0.035 in. Plug Gap^^1990/Chevrolet/Caprice/Classic Wagon 4-Door/5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated::0.035 in. Plug Gap^^1990/Chevrolet/Caprice/Classic Sedan 4-Door/5.0L 307Cu. In. V8 GAS OHV Naturally Aspirated::0.035 in. Plug Gap^^1990/Chevrolet/Caprice/Classic Sedan 4-Door/5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated::0.035 in. Plug Gap^^1990/Chevrolet/Caprice/Classic LS Brougham Sedan 4-Door/5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated::0.035 in. Plug G...