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The NGK Coil-on-Plug boot for 1997–1999 Audi A4 is a direct-replacement ignition boot that restores the connection between ignition coil and spark plug to prevent flashover and maintain reliable combustion after plug service. It provides OEM-style fit and consistent spark delivery. Constructed from premium silicone and including internal springs and ferrite resistors, it suppresses EMI/RFI, meets or exceeds OE specifications, and includes a limited lifetime warranty.
NGK Audi A4 1999-1997 Direct Ignition Coil Boot
