The JBA Cat4Ward header for 2003–2009 Toyota 4.0L V6 (w/o A.I.R.) uses 1-1/2" primaries and a performance-tuned collector to reduce restriction and improve engine efficiency where A.I.R. is not present. It’s a direct-fit option for specified non-A.I.R. models. Constructed from mandrel-bent 409 stainless with oversized ports, machined 3/8" flanges and factory-style emission connections for a secure, no-leak installation.
JBA 03-09 Toyota 4.0L V6 w/o A.I.R. 1-1/2in Primary Raw 409SS Cat4Ward Header