558-416 Main Harness Fuel Wiring Harness Adapter/MAP Sensor Adapter Harness Compatible with LS3-style MAP Sensor Adapter(1PCS)

Lot of work for wrong wiring! Out of return window, realize that cheaper is not always better.

Ordered this part a few months ago as I was building my car… I have been buying and returning MAP sensors and adjusting engine parameters just to find out this harness was WIRED WRONG OUT OF THE BOX. I’m lucky it didn’t fry my $1500 computer or blow my engine but I did waste weeks troubleshooting the car when something as simple as this was the problem… it’s 3 wires… how the hell do you mess this up

I could not have asked for a better part

After 2 days of trouble shooting with Holley, we figured out this was pinned (wired) wrong.Now that I read the reviews. It’s a common issue.DO NOT BUY

Good price! Good quality!

Bought and junk purchased feb full frame off build went to start yesterday and map sensor reading was only 18 brand new holley map sensor. Tried another map sensor definitely adapter harness spoke with others forums all said garbage stay away from cheap chinese crap. Purchased reputable brand instead.

they wired this completely wrong. The connections are not supposed to go to the matching pin on both plugs. They wired it backwards causing it to throw off MAP readings.

Connector and wires appear to be of decent quality. However the harness is pinned incorrectly. Had to switch red and green wires. Not a big deal, but annoying that it wasn't already done.