Both are amazing Speedo's, and both are 150 amps. The fan Is screwed on via the slots in the heatsink (sounds weird but works very well) and so can be fitted where it doesn't catch anything. There is info on the SMD website instructions wise.
I these things really are up there with the best, Nathan waters won the last worksop with a dualsky set up, and at west bridgeford buggy blitz this weekend, 3 out of the top 4 ran dualsky.
For the small extra cost I'd go for the 870 as it comes with the fan (won't be needed in 2wd) but you'll have the option of fitting it in a 4wd and fling it around the track with no overheating worries, ever.
|