Included with the adapter are four 5/16-18
bolts (with washers) to fasten the adapter to the intake
manifold, along with four 5/16-18 flange style nylon insert locknuts which are used
to secure the throttle body to the adapter.
Installation instructions are also provided.
The adapter is manufactured from quarter inch steel plate, to which
the steel studs are welded. The entire plate is powdercoated for looks and
What is it used for?
This adapter allows you to mount a Dodge Truck TBI style throttle body onto an intake
manifold which has a standard Holley 4bbl flange.
The TBI style throttle body was used on the 3.9L V6, 318ci V8, and 360ci V8 found in various
Dodge trucks and vans during the late 1980s and early 1990s. These motors were a stepping
stone between the older carbureted engines and the multipoint fuel injected Magnum
engines, and thus are affectionately referred to by many enthusiasts as "premags" or
"premaggers". The last year for the 3.9L V6 and 318ci V8 premag engines was 1991;
the Magnum 3.9L V6 and 318ci (5.2L) V8 replaced them starting with the 1992 model
year. The 360ci V8 premag engine held out for one more year (1992), finally being
replaced by the 360ci (5.9L) V8 Magnum engine in 1993.
This adapter may be useful to you if you are looking to do any of the following:
Convert an older carbureted (LA style) engine over to the TBI style fuel injection
Expand the intake manifold options for your existing premag powered Dakota, Ram or van
For example, if you would
like to swap out your stock intake manifold, this adapter should allow you to use an intake
manifold which was designed for one of the earlier carbureted LA motors, which would
likely have a Holley 4bbl flange (such as the Edelbrock 2915, 5076, 7176, 7576, etc).
Replace your existing long block or heads with the Magnum version
You should be able to purchase an aftermarket intake manifold designed for the Magnum
heads (such as the Edelbrock 7577 or the Mopar Performance M1), and use this adapter to
run the engine with your existing TBI fuel injection system.
This is a special order item. Given the understandably low demand for this product, I do not
keep them in stock. Instead, I build each one to order as necessary. When you place
an order, I will make every effort to build and ship your adapter as
soon as possible, but please allow 2-4 weeks for
About the powdercoat:
The powdercoat finish on this item is more about protecting it
from rust than for looks. As you can see from the photos above, once the
throttle body is installed, you can't see very much of the adapter.
As such, most folks opt to go with the default flat black. However, the
"no powdercoat" option is given above just in case you'd like
something different and plan to paint or coat it yourself to match
your engine or intake manifold, etc.
If you do get the adapter without
powdercoat though, realize that you will need to take steps to prevent
flash rusting if you do not paint or prime it right away. Also, I
build these adapters such that the finish is suitable for applying
powdercoat, which is much more forgiving than paint. If you are
trying to achieve a certain look with paint, you may need to perform
some additional finishing steps such as sanding, etc.