2012 Cummins ISX12 Diesel Engine Complete Jake Brake Set 4298971 and 4298972 OEM IN GOOD CONDITION PLEASE SEE PICTURES. COMPATIBILITY: MATCH PICTURES AND/OR PART NUMBER IF LISTED TO MAKE SURE THIS IS THE RIGHT PART YOU NEED BUYER IS RESPONSIBLE FOR COMPATIBILITY. ASK US IF YOU HAVE ANY QUESTIONS OR CALL YOUR LOCAL DEALER WE DO DOMESTIC AND INTERNATIONAL SHIPPING: WE SHIP WITHIN 1-3 BUSINESS DAYS VIA USPS, FEDEX, USPS OR FREIGHT WARRANTY : WE OFFER A 30 DAY MONEY BACK WARRANTY ON OUR PARTS AND DO NOT CHARGE A RESTOCKING FEE IF YOU HAVE ANY QUESTIONS OR CONCERNS, PLEASE CONTACT US BEFORE LEAVING ANY NEGATIVE FEEDBACK WE STRIVE TO KEEP OUR CUSTOMERS SATISFIED