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The JBA Cat4Ward header for 2007–2020 Toyota 5.7L V8 uses 1-5/8" primaries to reduce restriction and enhance power and efficiency compared with stock manifolds. Its Firecone collector applies race-proven tuning to improve torque where it matters. Constructed from mandrel-bent 409 stainless with extra-thick collector domes, oversized ports, and machined 3/8" flanges plus factory-style emission connections for a secure, no-leak installation.
JBA 07-20 Toyota 5.7L V8 1-5/8in Primary Raw 409SS Cat4Ward Header
