RX7 13B Turbo Manifold, Turblown Engineering IWG EFR

Brand new Turblown Engineering Cast IWG EFR turbo manifold, one of the highest quality manifold options available for BorgWarner EFR setups.

This is the latest investment-cast 347 stainless steel design, replacing traditional welded manifolds with a significantly stronger, more reliable construction.

Construction Far superior to standard 304 stainless, offering excellent durability under extreme heat with no welds – eliminating the most common failure point * One-Piece Investment Cast Design Seamless internal structure with no weak joints, providing long-term reliability and strength over welded manifolds * Tapered Runner Design (Volute-Inspired) Internal runners taper toward the T4 flange, increasing exhaust gas velocity and improving turbo response and spool characteristics * CNC Machined Flanges Precision-machined mounting surfaces ensure perfect sealing and fitment, unlike typical belt-sanded manifolds * Smooth Internal Transitions Fully optimised flow path with seamless transitions throughout, reducing turbulence and improving overall efficiency

If you’re after a reliable, high-performance EFR manifold without the common cracking issues of welded designs, this is one of the best options on the market.