You mean the car battery? Much cheaper car battery chargers out there.

So, you could buy a cheaper or different battery charger. An battery charger is needed to maintain good voltage on the car trough the prosses. If the battery charge dies you will have an corrupt file making your DME go crazy and possibly a no start situatuion. The battery charger that I have I think it cost me 120 or so, it's always good to have one handy.

charger

OK. So car battery charger. That would make sense.

$30 for this one: https://www.amazon.com/NOCO-G750-Ult...attery+charger

vs $150 from the shark company. No brainer.

The E53 X5 3.0i shares the same engine with the E46 330i.

Luckily there are a lot more E46 owners that are exploring modding these cars and a lot of their experience is applicable to us 3.0i owners.

Those guys are making Ebay turbo kits work, they are reprogramming the factory Siemens engine management up to FI applications.

Check out E46fanatics.com, they are doing amazing things to these engines there.

Here's a nice guide for bolt on mods, check the forum for the wilder ones.
330i M54 Tuning

you also have to consider the much heavier x5 so mod for mod the x5's will be slower compared to 3 series.

I am interested in that shark reflash though.

While that is true, if you could make 300 crank hp with a 5 speed and the 4.10s in the diffs, it would be swift.

Take out the back seats and the spare, and you could do pretty well.

Exceptions are few and far between that more air in from a cold air intake coupled with less restrictive exhaust will not result in an increase in HP/Torque. The added fun of cold air intake or low restriction exhaust is the sound that comes with it of course. Of the two, the greatest benefit for $$ spent will be lower restriction mufflers. There are additional benefits from other exhaust components but cost goes up quickly so the gain per dollar spent makes a sharp decline.

The best tune for a 3.0 would be one more focused on increase in TQ and a tune could easily be the clear first winner. To maximize the benefits of an airbox and low restrictive exhaust the tune would be for that particular airbox and exhaust combination. IMO a non name brand tune is not the way to go. Reliable tuners spend a lot of research to find the best map. Since the faster you want to go is directly related to how much you want to spend, how much do you want to spend?

but 300whp would be much better :D

Yes. but with a .25 AWD driveline adjustment, you are going to have to make 375 at the crank.

I don't think you can do that unless you put $1000 8.5:1 pistons in there.

And you need to keep the RPMs down under 6k, otherwise you are looking at imminent oil pump nut failure. Harmonics on this motor are apparently not so good above 6 grand.