erazor450

I would like to go with the off road style but here in California we have to smog every other year. So to eliminate being totally illegal I would go with the catted version. I guess my main concern is the catted version will take away the turbo whistle that I'm going for.

Roughneck12

Nope. Cat whistle is very clear and quite cool with the HF cats.

Boosted Limited

I like my HF cats setup! Check it out. SW made a top notch product perfect fit and finish. Thanks.

https://www.f150forum.com/f70/hf-cat...195179/index7/

ecoboost clark

Just finished installing catted downpipe exhaust is stock, cool sound & whistle throttle response is much better.

Fx4977

I have SW catted down pipes and ws a tube turbo cat back and it threw the CEL. I know a tube will correct this but I bought a factory 150k extended warranty. Also with cel on I can't use remote start. I know a tuner will solve both problems but want to stay away since I already have 70k miles. Is there any way to fool the sensors and get rid of the CEL light. I've been putting up with it for 5 months and it's driving me nutz.

Ecofx86

Get a tune. only way to get rid of cel

whoareyou

You could also try o2 sensor spacers.

Fx4977

Where is a good place to find o2 sensor spacers

Stainless Works

Sent you a PM. Any Questions let me know.

Thanks Chris

cooldude960

Will the chatted downpipes pass emission testing in AZ/Cali?