Let's See 2013- 1991= 22 years ago. Maybe you should read the EPA Reg's for 2013.There is alot of Info about 2- stage and 3-stage Cat's with up to 5 O'2 sensors.Check it out.... :|grandamman said:tc1959 said:TODoubleD said:against the law??? never heard that one before...
if i do it i would buy the dual exhaust kit with the cheap mufflers on JEGS Part Number # 555-30556 $229.99, down pipes for the stock manifolds, Part Number # 958-DGU13S $116.99 and from what Ive read the th350 will fit a 2004r the dual hump cross member, Part Number # 550-41050 $179.99 totaling $550.95
I paid $500 for my duals with a new 2 in 2 out cat and two Flowmaster super 50's. I had them run everything down the passenger side like a 442. So I didn't have issues with the cross member. It's not "against the law" here in AZ either.![]()
Here's a quick read about cats..
http://www.epa.gov/compliance/enforceme ... repair.pdf