MustangWorks.com : Ford Forums - View Single Post - Ever fail emissions with a mac (cat) h-pipe?

stangbang · 04-02-2001, 08:15 PM

I passed the Ohio emissions test with mac hi-flow cats.Holley heads &intake,24lb injectors
mac full length headers, timing @16 deg.btdc,
Sunoco 94 octane. I always run on the highway for a good 20 mins before testing. I don't know why but it helps.

04-02-2001, 08:15 PM	#10
stangbang Registered Member Join Date: Oct 1999 Location: brunswick,ohio Posts: 135	I passed the Ohio emissions test with mac hi-flow cats.Holley heads &intake,24lb injectors mac full length headers, timing @16 deg.btdc, Sunoco 94 octane. I always run on the highway for a good 20 mins before testing. I don't know why but it helps.