Gidday anyone know what this part does as far as tuning. I have stage one se  air  kit and stock debaffled pipes. Can I also change mufflers to SE slip ons with this ownload. I have heard this efi download 34454-07C/DT is good for most changes of pipe air cleaner.

I am in NZ. Had a power commander put in over the top and now starts hard. Will be changing mufflers again for the third time going with SE slash down. Had on V+H straightshots too noisey.Will probably leave in PC cos its there and already paid for and get the old girl re dynowed and get them to see why it cranks about 3 times before firing. When stock before PC fired instatly. Ran better with efi download than  PC.