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Review on πŸ”΄ AEM Red Cold Air Intake System Model 21-493R by David Ross

Revainrating 5 out of 5

Performance and Improved Diesel Engines per Gallon

We purchased this item two months ago for our 03 TDI and immediately noticed the performance increase and diesel savings. To be specific, driving from California to Texas: Before the AEM cold air intake went through various mph changes, the MPG was 44. After the intake, the MPG went up to 48+. You'll notice a performance difference as you go uphill and uphill. Great product for a TDI turbo engine to make it breathe like it should.

Pros
  • Made in USA
Cons
  • weak