Headers on 3UZFE LS430, SC430 or GS430?

[UCF11]

Has anyone here put custom or after market headers on their 3UZFE LS430, SC430 or GS430?

If so what kind of gains did you achieve?

 

[Lextreme II]

Plenty..... Pretty good result from what i hear..

 

[spf_lexus]

a solid 20whp is the norm on these engines. Prolem is that most of these fit the SC400 and not the LS. S&S used to be the only brand out there for the LS but you might want to check into IMF headers... they may have an option for the LS.

 

[JBrady]

The 4.3 engines have terrible stock manifolds.

Here is a comparison with the no longer available S&S headers.

 

[tcr101]

Has anyone tried the PPE headers? I believe they had a groupbuy on CL a couple months back (http://www.ppeengineering.com/products/lexus/gsscandls.php)

 

[spf_lexus]

Havent heard of them until now. They look very similar to S&S. They look promising... I say go for it. they also state no modding necessary. S&S also claimed this but in reality, users needed to cut/re-position the cats.