The engine bay of any diesel pickup truck is a harsh environment as it's full of heat that can rob power and performance, and Sinister understands the need for cold air intakes to tackle that issue all too well. You can't get the coldest and densest air in your engine without a cold air intake, so Sinister is sweetening a deal! Now when you purchase any Sinister Diesel Air Intake, you can get a free air filter cleaning kit. But hurry! This offer is only here while supplies last. Use promo code CLEANKIT. For more information, call 855-792-8292 or click here.