K&N Custom Racing Assembly Carbon Fiber Air Box w/o Base - Large REAR CARBON STEEL STRUT BAR The hole needs to be

The hole needs to be widened to approximately 3/4" diameter

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K&N Custom Racing Assembly Carbon Fiber Air Box w/o Base - Large REAR CARBON STEEL STRUT BAR The hole needs to beLight weight yet durable, K&N's Sprint Car Style Air Boxes are a must for any racer currently using traditional multi Siamese stacks. Constructed from ultra light weight carbon fiber K&N's Sprint Car Style air box provides ample air flow for your racing needs. As with all K&N filters, it is a washable and reusable air filter. Simply use K&N oil and cleaner to service your filter.