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      02-12-2011, 04:09 AM   #13
XRQTOR
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Drives: 2008 X5
Join Date: Jan 2010
Location: SYDNEY

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Quote:
Originally Posted by Bob MG View Post
Also stock headers with the cats restrict top end gains drastically. You will see on the oem system tune the power jump is biggest between 3-5k at 75hp

When you look at the catless map tune transposed over the other the gains are more even all through the rev rnge and particularly on top. I believe peak gain is very close to 650 but again on 95RON fuel

Hammann are Euro based where 99RON and 101RON are avaiable all over the
place hence 670
So essentially catless headers & tune will push 650/670hp, down here in Australia we get 98ron in 90% of places and 100ron in about 25% with more to come online over the next 12 months.

SO the question is, whos got the best catless headers and who does the best tune. Is there anyone out there doing induction mods or something other than exhaust & tune upgrades.
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