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  • Oh look.... a real car, with no hair dryer
  • Legacy Donating Member
  • Member For: 20y 1m 25d
  • Gender: Male
  • Location: Fear and Loathing in Callala Bay
Posted

Hey guys, just started planning my second series of mods to my 2003 xr6t, so I went down to my local exhaust guy to get a quote on a 3.5 metalcat & he suggested getting hold of a stock BF dump pipe & cat stating that it flowed better than the BA system. I for one didnt know this & I was wondering if anyone out there could shed any light on it. Many thanks.

  • Oh look.... a real car, with no hair dryer
  • Legacy Donating Member
  • Member For: 20y 1m 25d
  • Gender: Male
  • Location: Fear and Loathing in Callala Bay
Posted
Yes, BF is a 3 dump, BA is smaller.

Thanks for that. Do you think its, worthwhile as a retro fit or should I just go for the metalcat?

  • Member
  • Legacy Donating Member
  • Member For: 20y 4m 15d
  • Gender: Male
  • Location: Sydney NSW
Posted

The standard dump pipe on my BAmk11 is 3inch... Ive had it off the car and measured it myself, maybe mk1's had a different dump Fat?

  • Member
  • Member For: 19y 5m 24d
  • Location: Brisbane
Posted (edited)

I think you'll find that the BF and BA cats flow the same - someone ran some tests recently. So even if you upgrade the dump, you should still get a better flowing cat.

Also, the BF has 2 O2 sensors - one before and one after the cat. Not sure if this will effect a retrofit or not (I guess you just weld over the second hole?).

Dan

Edited by gu4800
  • Member
  • Member For: 21y 1m
  • Location: Sunnybank, brisbane
Posted (edited)

so is this definitely true that the bf dump is larger than a BA. In my case that would be Mk1 BA. If so might be a cheap upgrade alternative and with high flow cat :stirthepot:

Edited by BA_XR6Turbo_Ute
  • Legacy Donating Member
  • Member For: 22y 5m 16d
  • Gender: Male
  • Location: Sydney
Posted

If you can get one second hand for a carton of beer if might be worth considering the factory option (only if they really are bigger though). The BF dump and cat (ordered as one piece) from Ford will set you back around ~1300. All together now, "Faaaaaaaaark that!".

Just go ahead and get a 3.5" dump from xforce, and fit up a 3.5" MetalCal as you intended. It'll be better, cheaper, and easier.

  • Legacy Donating Member
  • Member For: 19y 6m 4d
  • Gender: Male
  • Location: airlie beach
Posted
:blink: I was going to to the same with mine I bought whole 3 1/2 " xforce exhaust for 1400 was going to cost that for dump pipe and cat it will fit in the origanal spot and has twin dump pipes so is about 4 1/2" dump all up you will have to get it tune but boost climbs up a bit .
Posted

so your the lucky bugger that got the last 1 in the country?

as to the bf dump they are 3" into cat and 3" out and I want some so if you have one please call me!

yes they flow aprox 20% better than ba no matter what manufactured tests are out there!

  • Oh look.... a real car, with no hair dryer
  • Legacy Donating Member
  • Member For: 20y 1m 25d
  • Gender: Male
  • Location: Fear and Loathing in Callala Bay
Posted

So what your saying is they're worthwhile putting on if you can get one?

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