Air Filter K&N Large Vanguard Flat Top EFI – Backwater Performance

K&N air filter for large block Vanguard EFI engines with flat top cover and no carb kit installed. Original K&N replacement parts. Improves throttle response, horsepower, and fuel economy. Can last a lifetime if maintained properly. This part is compatible with the following engines: Vanguard 37 EFI Vanguard 40

K&N air filter for large block Vanguard EFI engines with flat top cover and no carb kit installed. Original K&N replacement parts. Improves throttle response, horsepower, and fuel economy. Can last a lifetime if maintained properly.

This part is compatible with the following engines:

Vanguard 37 EFI

Vanguard 40 EFI

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