Where is the best plact to install the Defi boost sensor and should I connect it to the spare nipple on the manifold? It's hard to find and available bolt. I'm trying to avoid drilling.

 

I mounted mine on the front right fender side of the engine compartment, above the wheel well, right behind the strut tower, kinda by all the ABS stuff. There is a 10mm bolt already there that worked out great. I can snap a pic for you tommorrow if you really need one. I connected it to the spare nipple where the upper intake manifold meets the lower one. i also used a HKS inline vacuum line filter in an effort to extend the life of the sensor.

 

i attached mine to the ABS unit. i used a bolt that was already there, its a tight fit but looks awesome. i can take some pics too if u want

 

Thanks for the info. I attached it to the right fender near the ABS unit. I wanted to get it as far from the exhaust as possible.