Which 3uz Manifolds For MK2 Swap?


New Member
Hello, I'm new to this forum but not new to Mk2 Supras. I've begun a 1uz swap (91 LS400), and I was told on another forum that 3uz exhaust manifolds are a good fit with only minor mods. Is there a difference in the 3uz manifolds between the LS430, GS430, and SC430? I did a search but I found no satisfactory answer to my question.

I know they are not the best performance solution, but I'm more concerned at this point about ease of fit.

Any help on what is the best fit?


Try to find out if they have same or different part ##. At least you'll become familiar with toyota catalogs, that will help you later with your conversion.


Well-Known Member
They all list as the same which surprized me as I was expecting the SC to have something better. I have some on the next job I am doing.


The 1998-2000 LS400, GS400 and SC400 (1UZ-FE VVTi) have different exhaust manifolds. The LS and GS are very similar quasi Tri-y manifolds where the SC is a log.

The 2001-2006 LS430, GS430 and SC400 (3UZ-FE VVTi) have the same exhaust manifolds that are log style.

Pictures below are of the LS400 (left side) and the LS430 (next to an S&S header)