Full-Race's K-series Twinscroll EFR Internal-WG turbo manifold evolved as an option for those looking to have fast spooling, reliable HP without the complexity and weight of dual external wastegates, BOV, and boost controllers. Ideal for road racing and street/strip setups, this proven design will spool faster, last longer, and produce more reliable power across the entire RPM range than any other manifold on the market. EFR internal wastegate requires 'C-housing' 0.92 A/R EFR turbochargers and maximizes firewall and brake master cylinder clearance.
Our classic Honda B-Series ProStreet "Ramhorn" turbo manifold is what started it all. A legendary design with great history - this manifold has been proven with every size and type of turbo imaginable. A simple 4-1 turbo header design starting with a low angle merge collector and long runners for unrestricted exhaust flow (a must for VTEC engines). To this day it is one of our most popular and best selling turbo manifolds.
T3 EFR Turbo Options: EFR 7064, EFR 7670, EFR 8374, EFR 9174, EFR 9180 with 0.83 A/R Undivided IWG
*Engineered using advanced CFD software and analysis
*Precision Fabricated from thick wall stainless steel
*Robotically TIG welded construction
*CNC Ported head flange
*Sealing surfaces machined flat ensuring a leak free seal
*Not AC compatible.
*Must trim PS bracket in order to retain PS.
*Must use 1/2 sized radiator.