Honestly, they are nice but just not worth the cost over $40-50 sets, TBH... Check out
THIS awesome independent review site that tests bulbs in reflector
housings... Note the Morimoto way down in the Premium cost section rankings, you have to click "Load all Premium Kits" just to see them... I personally had them and sold them as I was more impressed with the ones that were under $40 you see at the top of the budget section... As far as noise, you can see they are rated at only 62dB, lower than many others, someone must have had them sealed in a really hot
housing or had a defective fan if they think the fans are loud.
So, I tried about a half dozen sets in my reflectors before upgrading to Euro projectors and I can also tell you at 40mm long (size available at that Bulb Facts chart too) that they stuck out the back and you will need domed rear covers if you care, but they are skinny so you won't need to trim the
housing opening... BUT, again, I strongly advise going with the Cougar X Small H11 instead for under $50, they have excellent glare control and a big improvement in brightness. And just about all, even "mini" and "X small" LED's usually have a tight fit, the Cougar X Small will be a tight fit in length so when installing be careful and just pull the
headlights and maneuver them into place as gently as possible getting that back of the heatsink up against the back
housing to make sure you get them in nice and straight...
Feel free to look closer at my stickied thread HERE for more talk on LED
headlights. Hope that helps!