C3-C4 New Platinum TT Spark Plugs 4509 - 4 Count 1972-1991

New reproduction platinum TT Spark Plugs 4509 - 4 Count for 1972-1991 Corvettes.

• When you need to replace the spark plugs in your 1972-1991 Base/ZR1 Corvette, consider these 4 count Denso #4509 Platinum TT Spark Plugs. This twin-tip (TT) spark plug is meant to be one-step beyond traditional platinum plugs. The 1.1mm platinum center electrode is augmented by a titanium-enhanced ground electrode, which delivers maximum ignition energy under the fiercest of conditions that the combustion chamber of your engine can dish out.
• The ground electrode's design is a free-standing firing pad that reduces quenching to generate a more power spark. You'll get faster starts and improved fuel economy.
• Features:
• Platinum/titanium design.
• Twin tips.
• 1.1mm platinum center electrode.
• Minimum-quench electrode design.
• Improved fuel economy.
• Faster starts.
• Increased engine efficiency.
• 4 count.
• Fits:
• C3 1972-1982 Base / ZR1 Corvettes.
• C4 1984-1991 Base / ZR1 Corvettes.
• Corvette Is A Registered Trademark Of The General Motors Corporation.
• See Additional Details Tab For Complete List Of Submodels This Item Fits.
• Quantity: 1 ST

Reference part number: Mods #22919.

GM Part Number: 205116