Most e-mails are answered within 24 hours, Not including weekends and holidays. Product Specifications: New Cleaner Air For Cummins Engine Parts 4BT 6BT 6CT 4B3.9 6A3.4 6B5.9 3281238. Price for 1 Set. Processing begins as soon as an order has been placed, therefore we cannot change, cancel or modify orders once they have been confirmed. All the Warrentee Are Limited… Read more →