Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Bought the car with headers all the way back to a giant catback

sc2dave · 10-30-2011, 07:10 PM

If high egts kill cats,then why do the oem's install pre-cats,INCHES away from the exhaust valve? I guarantee no header is going to make it run hotter than that on a cat about 3-6 feet away from the ex. valve.

10-30-2011, 07:10 PM	#48 (permalink)
sc2dave EcoModding Apprentice Join Date: Mar 2010 Location: Los Angeles Posts: 110 Thanks: 0 Thanked 5 Times in 5 Posts	If high egts kill cats,then why do the oem's install pre-cats,INCHES away from the exhaust valve? I guarantee no header is going to make it run hotter than that on a cat about 3-6 feet away from the ex. valve.