Looking to buy a few parts from a friend with a EM1 Si, wondering if his I/H/E, Skunk2 IM, and springs/struts will fit on a 95 LS.

 

The Header will work (B-series headers will all bolt onto other B-series heads), but your muffler piping and cat will have to be modified.

Exhaust could be modified to fit, may require welding.

Intake filter will work, intake piping will probably need to be swapped.

Suspension is different, won't work.

IM shouldn't work, unless you have a VTEC head

So, bottom line, take his air filter, exhaust and header, and take it to a muffler shop.