Cracked exhaust manifold 2005 v8 4.7 VVti

[Rave]

I have a cracked exhaust manifold.. Toyota wants $2,000 to fix one side. There were apparently no after market headers... so until recently you had to go with the same low quality OEM Toyota part. But in August 2014 Underdog Racing Development started to carry "THY-563-SS-C, Thorley Header, for 05-09 4runner, with 4.7 V8 VVTi engine". Cost $749.; stainless steel, ceramic coated, limited lifetime warranty... but no catalytic converter built in, and I don't think there are any air injection connections. Has anyone tried these headers on the 4.7 VVTi engine; and if so, what adaptations were made and/or required. Many thanks for any info.

 

[Ruffian]

There is a whole thread going on the D.T.'s. Found here:
http://www.toyota-4runner.org/4th-g...8-4-7-doug-thorley-headers-7.html#post1897984

 

[Rave]

Thorley Headers

Thanks, I found a bunch of info. and it is all good. What a deal for the pair at about $749. US. Available from either Doug Thorley or Underdog Racing.

 

[Bonyfattony]

The headers are well worth it.

 

[montana_jeepn]

I am having a set of DT headers installed on Monday. Check out the pics I posted at the end of the post at the link above, but I think there are air injection connections on the header.

There is also a bung for your upstream A/F sensor. I am going to retain the factory cats.