T25 oil line size, -3 or -4?
 

searching turned up a whole slew of different answers, and i just want to clarify things.

I have an older T25, non ball bearing, turbo. does it need to be supplied with a -3 or -4 feed line?

thanks!

most people use a 7/16-24 -3an inverted flares. however, -3an fittings to the block are nearly impossible to find, if you do, they are $20. whereas a -4an fitting is $5-7. if -3an i'd run without a restrictor, if -4an id rock a restrictor.

i was planning on running a sandwich plate which has 4, 1/8npt holes. and 1/8 to -3 fittings are a few bucks.

Thanks for clarifying, ill go with the -3 lines and fittings..

Tunertoys offers a block fitting for the oil pressure sender for 21 bucks. 1/8npt tap.

Thanks for the mention Sam. Those block fittings are located here...http://tunertoys.zoovy.com/product/O...al_Outlet.html

Also, we should be close to having feed line kits for those using the OEM block port.

Craig