Review on K&N Cold Air Intake Kit for 2003-2004 FORD Mustang Mach 1: High Performance, 50-State Legal: Boost Horsepower with Model 57-2555 by Timothy Wall
Not a big difference
The response time of my mach1 has improved a bit. The car breathes better but stalls at idle. I have a 5 speed manual car so I don't know why it stalls. Maybe my car computer will configure itself. The good thing is you'll never have to buy an air filter again. Whenever I clean the filter I will put the diffuser mesh back in and see if that fixes the problem. I like it best and takes up less space in the engine bay. K&N is a good product. I used to have one like this on my Chevy S10 and it was great.
- MAXIMUM DURABILITY: The 10 year/million mile limited warranty protects your vehicle for the lifetime of your vehicle.
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