| Calling SLP wasn't very helpful for me. No specifics at all. They did tell me it was for a car with opened up exhaust(headers/cat-back) and free flowing intake(CAI"cold air induction" and SLP runners?)
I have one for my car 89 5spd 305 TPI, It does turn the fan on earlier and also has a rev-limiter at 5500rpm. I did have a very noticible difference SOTP after the chip and home made CAI. At the track I gained .5 sec and 3 mph in the 1/4 with these mods. (I already had headers and a muffler/highflow cat)
I believe these chips are coming from part of a SLP performance kit they used to offer including:the chip, SLP runners, SLP CAI, SLP headers, and SLP cat-back.
I'd say go with it if you plan on getting headers sometime and aftermarket Intake Runners. It's cheap if you want a chip and don't want to get into custom prom burning right now.
It was the most cost effective vs. performanced gained mod for my car so far. $80(shipping is $10) and 30 min to install.
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14.62@96mph headers, muffler, chip, ghetto stuff, duct tape
89 GTA 305 TPI 5 speed 3.42 gears | 
