i have pics of 02's after the cat, check my 'new f150online' gallery or my thread in this section 'redid exhaust for the third time..'

 

I might be a complete 'tard because I can't find the 94306s on Magnaflow's site but I might be interested.

I was figuring on going with the 94136s since they already have the O2 bung in them though.

 

94306 cats. http://store.summitracing.com/partde...5&autoview=sku

Some people have had CEL issues with the pre-O2 mounted cats.

 

are those the cats that have the o2 sensor mounted in the cat? cause thats the style i have from factory, why have people had CEL issues with these?

 

did your truck come from the factory with the o2s mounted inside the cats?

 

yea just let me know

 

No those hi-flow cats dont have O2 mounts. You dont want the set that has O2 mounts, the O2 sensors dont read them right and trip the CEL. You need the O2s to me mounted AFTER the hi-flow cats to read it correct and not trip the light.

 

ok. thanks for clearing that up 4 me.

 

do you know about how far back behind the high flows the o2 sensors should be mounted?

 

Good to know.

I was trying to avoid having to get someone to weld in the bungs. The one GOOD exhaust shop around me closed up. The last work I'd seen on a buddy's exhaust... My crappy welding would look and probably be better.

So the 94106s would save some cash or is the 94306 better?

 

Just an inch or so. Not too close, not too far.


94106s are louder and cheaper ($67 ea. )since they're a smaller cat ( takes less stainless steel to make them ) The 94306s are 30% quieter than the 94106s and are T-304 stainless ( shiny ). All depends what you think you would more prefer, the loudest sound close to cat-less, or a louder sound but not too loud.

 

ok, sounds good!

 

I'm interested. Please let me know.

 

I suppose I'll revive this thread. Can you just reuse the stock O2 sensors or would you have to buy new ones?

 

Just delete the cats and get an sct tuner from Jdm Engineering or a dyno tune from whoever you choose.