Cmbonni Posted November 24, 2018 Share Posted November 24, 2018 I have a 91 with gray caps and they keep failing, instead of replacing crappy injectors id rather just replace the rail. The only 90s Subaru I could find was a 96 with red caps, I took the risk and bought them. Now I'm looking online and I keep seeing things like ecu and maf swap, lack of compatibility, etc. My question is did I just spend money unnecessarily or can the 96 rails fit and run properly in my 91. Link to comment Share on other sites More sharing options...
wtdash Posted November 26, 2018 Share Posted November 26, 2018 the '96 rails - as long as from another SOHC - should bolt up OK...note that yours may have spacers where they bolt to the intake manifold.....I think you'd KEEP those w/the '96 rails. ...but if they leak remove 'em. If yours is the 5-speed they DID have a different MAF/ECU than the Automatics in '90-'91. But I'm not 100% sure if there's enough difference to be an issue. They used those same red caps on the '92-'94 Legacy, too. Due to wiring differences on the TPS or IAC (can't recall) I don't think the '92+ ECU will work on the '90-'91 - could be wrong. Go search on Legacy Central BBS, too. Link to comment Share on other sites More sharing options...
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