i have a 94 ej1 and i jus put a gsr engine in it with new dc headers and a v2 intake. i was wondering do i use the ej1 radiator or the gsr one?

 

use the civic half rad, you will need to use adjustable gear style hose clamps to clamp the larger integra hose on, the ideal rad is from a '94 - '97 Del Sol VTEC or '99 - '00 Civic Si. its the same size as a normal civic rad but has the larger B-series inlets.