Castel Hill Headers in SC400

[jgscott]

Does anyone know if the Castle Hill Headers will fit in the Engine bay in a stock SC400 ? 1998. Seems there is another post about measuments but wodering if anyone has them installed in a SC400. Do they fit and any problems ?

 

[Lextreme II]

What car was it made for? I know that SS headers were made for the GS400 and SC400 (pre-98) would not directly bolt on. They have different cat flanges. Basically the cut off date is 1998. The cat flanges are slightly different.

 

[JBrady]

There is a post on here somewhere about the castle hill headers. They use a standard 3 bolt header flange that will not fit any Lexus catalyst. The primary diameter looks to be 1.625" which is most likely going to hurt low end torque. Here is a link on installing the S&S headers on a 98-00 SC400. Even though the flange fits the cats the length is too long. SC400 used the same terrible manifolds from 92-00 with the exception being the different flanges for the cats in 98-00. http://mysite.verizon.net/res6pb6m/id11.html

While not perfect the S&S are my choice over the castle hill parts.

There is another bolt in header that eliminates the cats but I don't know of anyone using them or anything about the company selling them.

 

[jgscott]

I know there may be some Cat match issues but what I was woundring was about the clearence between the mount at the exhaust port and the tubes clearing out the the cars engine bay walls.

 

[JBrady]

Couple of helpfull threads for you.


http://lextreme.com//forums/showthread.php?t=5435&highlight=headers

http://lextreme.com//forums/showthread.php?t=6156&highlight=headers

 

[Lextreme II]

From this post http://lextreme.com/forums/showpost.php?p=47079&postcount=14 Looks it will fit. However you need to mod the cat. Its slightly shorter then stock.