the compact 5 simply has a smaller overall diameter for the bolt pattern?Gearhead_42 wrote:Oil/water lines should bolt up (though if it's BB you should get a restricter), most likely need adapter for use with S13 intake pipes. The downpipe will not work, the RBs use a different bolt pattern on the turbo, garrett calls it the "compact 5-bolt" pattern.
S14/S15 should bolt up easier, but downpipe still won't work