This OEM+ D-Style RAM Air Intake for the US airbox is here to replace the discontinued DINAN and DIY DINAN cold air intake for the N51/N52 community. Allowing YOU to supply the engine with an extra 2.75" of air breathing. It takes advantage of the high pressure cold air from your lower bumper to improve horsepower, torque and throttle response. Designed to work with the factory US airboxes with slight modifications for installation. NEW NEW: CHECK OUT OUR EURO AIRBOX ADAPTER ATTACHMENT - KIT Youtube - N52 Intake Sounds | Dinan attachment with N54 Manifold Forum - +15hp +16ft Youtube Video Installation: Youtube - BMW N51/N52 D-Style RAM Cold Air Intake Adapter YouTube: E90 N52 | Budget Dinan Ram Intake DIY - Raimund installation requires: not included (Option 1) x3 8mm thread bolts, x3 8mm thread nuts, x6 washers (Option 2) OR plastic rivets / push pins (Option 3) OR after fitment confirmation, JB plastic weld together black / grey RTV (optional) Dremel & Drill Fitment: US AIRBOX: / EUROBOX - E90, E91, E92, E93 N51/N52 323(x)I 325(x)I, 328(x)I, 330(x)I, - E82, 125i, 128i, 130i if you would like to order an attachment without bolt holes, or a different diameter, or colour please contact us through the website, Instagram or email! Attachment OD: 69mm | 2.7” Attachment ID: 65mm | 2.6” Lifetime Warranty - Made out of PETG. Part Numbers: PrintablesAuto: DIA52 Interchange: DINAN D762-0066, D760-9000