| If you have the TOR's and the cat box removed and replaced with the bypass pipe, then the chart says to put in the 20149 tune.
If you replace the stock filter with 3 individual K&N filters mounted directly to the throttle bodies, you will get more air and the stock tune should run it too lean. You need to add extra fuel to go with the extra air. This could cost you $400 US for a PCIII plus $200-300 to custom map it. Plus the cost of the individual K&N filters and the hassle of removing the manifold.
Or, you could buy Tuneboy for $400 US, download the 20050_2 tune (or a variant posted on this site to help get rid of the popping on decel), and you would have a pretty good setup - you would get the extra power from the freer-flowing exhaust plus you would have the secondaries open 100% of the time..
Why don't you start by replacing the stock filter with a single K&N filter ($60 US) and having your dealer load the 20149 tune?
Last edited by dougl; 03-27-2007 at 05:51 PM.
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