Header System

xxxavier2k · April 28, 2004

I've seen a header system including "y" pipe and 3" catback piping for the 1mzfe engines. My Windom however is a '93 (3vzfe) Does any body out there know if the headers for the 1mzfe can bolt on to a 3vzfe engine.

I know the blocks are different but are the heads very diferent too?

SKperformance · April 28, 2004

the manifold is different the y pipe is different and the cat is different

as well as the egr system that connects to the rear manifold.

It would be easier with a 1mz-fe engine as well as at least a 95-96 modle as even the 94 is different

Lex3486 · April 28, 2004

The 94s are different from the 95-96's? :huh: Howso?

xxxavier2k · April 29, 2004

Wow thanks. I guess it's back to the performance upgrade drawing board. :(

squarehat · April 29, 2004

The 94s are different from the 95-96's? Howso?

sk, was that when the engine went to distributorless ignition and added Acoustical Control Induction System (ACIS), the Lexus equivalent of BMW's VANOS I?

SKperformance · April 29, 2004

NO

in 94 they introduced the accoustic intake on all 1mz-fe engines as did the distributorless ignition on all ones.I have seen the rear plugs go back to wires for the rear plugs though for 96 not sure about 95.

in 95 they chanegd the y pipe heights

in 97 they changed the intake head and valve train as well as the egr system upper rear exhaust manifold and the y pipe which now included the cat as one peice.