Reviewed By Michael C (Luray, VA) Reviewed for a 2001 Pontiac Firebird —2/13/2017 10:33 PM
This is my second filter from K&N and they are amazing. I've tried other brands as well but K&N delivered where it matters. MPG and HP gains. For my 2005 PATHFINDER I noticed a combined 2.3MPG city and highway over a 21 mile commute. Weeks of recording MPG with standard filter and my K&N. For 2001 Trans AM the dyno averaged 4.7 increase HP over my stock. 7 tests and took the average of all 7. 5 highest were K&N. And also increased from 20.8 to 23.7 highway MPG.