The preferred exhaust header for 2F drivers around the world; brought back to life and better than ever in stainless steel!
TriMeki headers are a reincarnation of the famous Downey Off Road Manufacturing 3-2-1, “positive interference” design. We licensed the original design and then made numerous improvements to improve the installation experience and overall fit. Starting with the previous, original designs, we partnered with the experts at Ultimate Headers in Berea, Ohio. Their master fabricators have produced a stunning work of art designed and expertly assembled to provide optimum exhaust flow while remaining true to Downey’s original one piece design.
We used 100% stainless steel construction throughout for strength, corrosion resistance, and long life. The mounting flange is hand ported after welding to optimize gas flow from cylinder head to the CNC mandrel bent primaries. Hand TIG welding utilizing back purging is used to prevent weld porosity and to maximize strength. It takes up to 16 hours to painstakingly craft each header by hand. One look and you’ll be a believer too. This is the finest 2F header ever made.
The 3 into 2 into 1 tubular header design for the Toyota 2F 6-cylinder engine was originally introduced by Jim Sickles of Downey Off Road Manufacturing (Downey on ih8mud.com). There have been several updates and revisions through the years. Downey Off Road closed their doors in 2009 but Mark Algazy of Mark’s Off-Road (65swb45 on ih8mud.com) arranged to continue building and selling an updated version of the original Downey header. As of 2015 Mark’s had also (unfortunately) ceased regular production of headers.
Based on the continued popularity of the tried-and-true F/2F engine, we set out to answer the call in the Land Cruiser community for a new supply of quality headers. Land Cruiser owners wanted a replacement for so many cracked Toyota manifolds, and rusty aftermarket mild-steel headers. We wanted something just a bit better.
Our new header synchronizes perfectly with the Toyota 2F inline 6-cylinder combustion pulses, thereby maximizing exhaust scavenging. The 3-2-1 design develops excellent torque at low RPM while the 1½" primaries and 2½" outlet provide maximum flow for horsepower at the top end. Drivability throughout the entire RPM range is achieved with a superior balance of torque and horsepower as compared to 6 into 1, or three-piece long-tube header designs.
Flange: ⅜" thick 304 stainless for strength and stability with laser cut precision to provide the best fit possible. Internal welds are hand ported.
Tubing: 1½" diameter primary tubes are CNC mandrel-bent from 16 gauge heavy duty 304 stainless steel tubing. The mandrel bending ensures optimal exhaust gas flow by eliminating any kinks or restrictions in the header tubing.
Hand : TIG welded by the finest exhaust craftsman in the business today utilizing back purging to prevent weld porosity and to maximize strength.
Collectors: Designed and expertly assembled to provide optimum gas flow and smooth transition to the header outlet.
Extreme Low Profile 316 stainless steel exhaust clamp and articulated joint: A TriMeki exclusive! Our rugged, investment cast, detachable clamp, with its claw-style hinge allows for easier exhaust system installation. The clamp and radius flared exhaust joint offers 13 degrees of exhaust pipe articulation while a slip-in backup mandrel assures a leak-free, air-tight connection.
This “ball and socket” style junction helps to maintain a continuous inner diameter for optimum airflow.
Use the weldable 2½" diameter outlet stub included in the kit to fabricate a free-flowing custom exhaust or adapt the new header to your original Toyota exhaust system.
O2 Sensor ready: The radius-flared 304 stainless steel outlet stub comes with an integrated oxygen sensor bung. The perfect match for a Holley® Sniper EFI or other EFI installations.
Hardware: ARP stainless fasteners to match our exclusive 316 stainless steel low profile clamp.
Made in the USA: Built with pride in Ohio, USA using a precision engineered fixture for reproducible, consistent construction and optimum fit.
Extras: Every header ships with a new Remflex® high performance manifold gasket to ensure your installation is leak free for years to come.
Made in the USA.
All specifications subject to change.
The header is designed to fit 69-87 FJ40/45/55/60 equipped with the late ‘69 F engine or newer straight 6 engines.
The header does not fit on vehicles with a column shifter or factory PTO.
The header is not designed to fit engines equipped with the ‘66-’69 wide runner manifolds.
NOTE: Not legal for use on emissions controlled vehicles.
We highly recommend the application of a ceramic coating.
For customers seeking the highest level of thermal management regardless of cosmetics, we strongly recommend Swain Tech Coatings ’ proprietary products.
For customers not as concerned with thermal benefits, there are several national brands that provide more cosmetic focused “ceramic” coatings with a high shine, custom colors and moderate thermal benefits.
American Made
Crafted with only the highest quality materials, designed and manufactured in America, our product is backed by a limited lifetime warranty.
Every part is designed with precision and passion, ensuring your vehicle performs at its peak.
We design our products so you can spend less time wrenching, and more time cruising.
The preferred exhaust header for 2F drivers around the world; brought back to life and better than ever in stainless steel!
TriMeki headers are a reincarnation of the famous Downey Off Road Manufacturing 3-2-1, “positive interference” design. We licensed the original design and then made numerous improvements to improve the installation experience and overall fit. Starting with the previous, original designs, we partnered with the experts at Ultimate Headers in Berea, Ohio. Their master fabricators have produced a stunning work of art designed and expertly assembled to provide optimum exhaust flow while remaining true to Downey’s original one piece design.
We used 100% stainless steel construction throughout for strength, corrosion resistance, and long life. The mounting flange is hand ported after welding to optimize gas flow from cylinder head to the CNC mandrel bent primaries. Hand TIG welding utilizing back purging is used to prevent weld porosity and to maximize strength. It takes up to 16 hours to painstakingly craft each header by hand. One look and you’ll be a believer too. This is the finest 2F header ever made.
The 3 into 2 into 1 tubular header design for the Toyota 2F 6-cylinder engine was originally introduced by Jim Sickles of Downey Off Road Manufacturing (Downey on ih8mud.com). There have been several updates and revisions through the years. Downey Off Road closed their doors in 2009 but Mark Algazy of Mark’s Off-Road (65swb45 on ih8mud.com) arranged to continue building and selling an updated version of the original Downey header. As of 2015 Mark’s had also (unfortunately) ceased regular production of headers.
Based on the continued popularity of the tried-and-true F/2F engine, we set out to answer the call in the Land Cruiser community for a new supply of quality headers. Land Cruiser owners wanted a replacement for so many cracked Toyota manifolds, and rusty aftermarket mild-steel headers. We wanted something just a bit better.
Our new header synchronizes perfectly with the Toyota 2F inline 6-cylinder combustion pulses, thereby maximizing exhaust scavenging. The 3-2-1 design develops excellent torque at low RPM while the 1½" primaries and 2½" outlet provide maximum flow for horsepower at the top end. Drivability throughout the entire RPM range is achieved with a superior balance of torque and horsepower as compared to 6 into 1, or three-piece long-tube header designs.
Flange: ⅜" thick 304 stainless for strength and stability with laser cut precision to provide the best fit possible. Internal welds are hand ported.
Tubing: 1½" diameter primary tubes are CNC mandrel-bent from 16 gauge heavy duty 304 stainless steel tubing. The mandrel bending ensures optimal exhaust gas flow by eliminating any kinks or restrictions in the header tubing.
Hand : TIG welded by the finest exhaust craftsman in the business today utilizing back purging to prevent weld porosity and to maximize strength.
Collectors: Designed and expertly assembled to provide optimum gas flow and smooth transition to the header outlet.
Extreme Low Profile 316 stainless steel exhaust clamp and articulated joint: A TriMeki exclusive! Our rugged, investment cast, detachable clamp, with its claw-style hinge allows for easier exhaust system installation. The clamp and radius flared exhaust joint offers 13 degrees of exhaust pipe articulation while a slip-in backup mandrel assures a leak-free, air-tight connection.
This “ball and socket” style junction helps to maintain a continuous inner diameter for optimum airflow.
Use the weldable 2½" diameter outlet stub included in the kit to fabricate a free-flowing custom exhaust or adapt the new header to your original Toyota exhaust system.
O2 Sensor ready: The radius-flared 304 stainless steel outlet stub comes with an integrated oxygen sensor bung. The perfect match for a Holley® Sniper EFI or other EFI installations.
Hardware: ARP stainless fasteners to match our exclusive 316 stainless steel low profile clamp.
Made in the USA: Built with pride in Ohio, USA using a precision engineered fixture for reproducible, consistent construction and optimum fit.
Extras: Every header ships with a new Remflex® high performance manifold gasket to ensure your installation is leak free for years to come.
Made in the USA.
All specifications subject to change.
The header is designed to fit 69-87 FJ40/45/55/60 equipped with the late ‘69 F engine or newer straight 6 engines.
The header does not fit on vehicles with a column shifter or factory PTO.
The header is not designed to fit engines equipped with the ‘66-’69 wide runner manifolds.
NOTE: Not legal for use on emissions controlled vehicles.
We highly recommend the application of a ceramic coating.
For customers seeking the highest level of thermal management regardless of cosmetics, we strongly recommend Swain Tech Coatings ’ proprietary products.
For customers not as concerned with thermal benefits, there are several national brands that provide more cosmetic focused “ceramic” coatings with a high shine, custom colors and moderate thermal benefits.
