Couple of observations…
-Aftermarket companies always exaggerate their claims for performance increases particularly CAI systems. The dyno charts show no info for the CAI alone…all include their "chip tuning"
-The OEM system is already pulling air from outside the engine compartment via a snorkel in the front grill.
-When looking at the engine there are two snorkels in the front grill…the right one brings outside air directly to the turbo area to assist cooling and having air flow in the engine compartment circulating to bring turbo induce heat down a bit and the left one is for the CAI (the set up is different on the GLA45 so this reference is for the GLA250). Looks like the ARMA setup deletes the air flow to the turbo area by using it for the CAI system. I do not think that is a good idea.
-The ARMA setup would dress up the engine bay a bit, but I question its functionality.
I would crack open the air filter box to see what type of air filter it has (flat pleat or barrel or cone pleat). Going with a less restrictive air filter (barrel or cone) is always good and lot cheaper than buying an entirely new CAI system.
If the aftermarket CAI gives you AT MOST a couple hp, you will not notice a performance change. I you want to dress up the engine bay, the ARMA unit looks nice but at a price.
That is true, it'll just take some time as there aren't many GLA45 that upgrades and gets a dyno. Just got to check out the CLA forums though just lurk for info there as there are far more CLA45 owners than GLA45 at the moment.
This is specific to the GLA45 CAI, but this thread got me to thinking what was the air filter set up from the factory. To my delight it has a high performance 'round straight' (aka barrel) shaped air filter. It is about 9" L and 7"+ dia>>>
This is why one needs to go cautiously with aftermarket product…a very interesting design feature I have never seen in a car. Part of the air box is a portal in which the ECU heat sinks are exposed to the air flow within the air box>>>
Here can see the heat sinks just behind the air filter>>
And with the air filter removed the ECU is clearly visible>>>
The aftermarket CAI I have seen to date do not allow for that ECU cooling feature and the last thing you would want is a fried ECU. That would be a very expensive lesson.
I do not know if the GLA250 has anything like this???
OK…the ALPHA set up is ONLY the filter cartridge and not an entirely new CAI as shown by the OP. But again, I can not see a 20 hp gain just from switching out the cartridge and enlarging the air box outlet ~40%. Looks like a nicely done set up, just the claimed hp gains are questionable.
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