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Speed Density


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cobb accessport

http://www.nolimitmotorsport.com/prod/NLM-SpeedDensityKit-WRX04

and this kit. but call them and order over the phone as you need 08+ wrx/05-09 lgt omni map sensor. unless you are running an sit intake manifold with sti throttle body.

 

you can also ask for a 3 bar instead which is good for about 28psi. instead of about 42 or so.

 

also have someone who knows what they are doing to wire in the intake air temp sensor, it requires tapping into your old maf wiring.

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What benefit does this provide over reg tuning?

 

It's needed to properly tune an aftermatket air intake which unless your running more than like 350whp the stock is just as good and less headache

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I wouldn't use a HP figure to judge when you need it...rather who's doing the tuning. It's not really overkill or anything, just another algorithm for the ECU to use(if I told you Honda uses this, stock, would you still say it's "overkill"? lol).

 

Though, I do notice a lot of turbo MAF guys go SD simply to run an BOV vented to atmosphere.

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