Carburator Adapters

We offer the widest selection of heat resistant carb adapters & spacers anywhere. Since we manufacture all our carburator adapters and spacers in-house, we can make custom pieces for your application. Standard size on all adapters is 1 inch. All adapters are supplied with mounting hardware. We also have gaskets available.

#101 Apapter
Holley 2 Barrel Carb Adapter
Allows adjustable positioing of Holley 2 barrel on Q-Jet manifold or any intake with “inside” (4 1/4″) bolt pattern.
Part #101 (1”) $79.50
Part #101-AR – (1″) with radius bottom $99.50
Holley or Rochester 2 Barrel Carb Adapter
Adapts Rochester or Holley 2 barrel to (inside bolt pattern) Q-Jet intake.
Part #102 $95.00
Part #102-105 for outside bolt pattern – $95.00[/one_third_last]

* Note: When using the #101 or #102 adapter to position a 2 barrel carb over secondary bores of a Q-Jet manifold with an unmodified plenum area, special gasket #101G must be used to seal off primary bores of intake.

#104 Adapter
Holley 4 Barrel Carb Adapter
Adapts Holley 4 barrel carb to Q-Jet intake. We’ve tested several height combinations with a 4 barrel carb on the Q-Jet intake, and the 1″ tall 4 hole spacer works best.
#104 $95.00

#105 Adapter
Holley 2 Barrel Carb Adapter
For aluminum intakes with “outside” (5 5/32″) bolt pattern.
#105 (1”) $74.50
#105-AR (1″) with radius bottom $99.50
#105-1.5 (1.5”) $99.50
#114-1.5 (1.5″) with radius bottom $145.00
#108 Adapter[/one_sixth]
Holley 2 Barrel Carb Adapter
Holley 2 barrel carb to Chevy 2 barrel intake.
#108 $60.00

* Note: All mounting hardware is included with our spacers & adapters!

The best 2 barrel adapter on the market for open plenum aluminum intake manifolds.

  • Unique 2” tall adapter starts as our popular #105 adapter.
  • An additional 1″ spacer (#113) is added and a radius blended into the bottom.

#114 Adapter
Part #114 Adapter
The best 2 barrel adapter on the market for open plenum aluminum intake manifolds.
Unique 2” tall adapter starts as our popular #105 adapter.
An additional 1″ spacer (#113) is added and a radius blended into the bottom.
Part #114 2 piece adapter, run as 2″ or 1″ … $189.00
Part #114-1.5 1 piece adapter, 1.5″ tall with bottom radius … $145.00

#101 Carb Adapter Dyno Test

#101 Dyno Chart

Test Engine: 355, stock Q-Jet intake, stock ’492 heads and 500 Holley 2 barrel.

As you can see, our Part #101 Adapter produced 8 more horsepower at 5,500 rpm than a die cast aluminum adapter.

#114 Carb Adapter Dyno Test

Don’t make a 24 horsepower mistake!

#114 Dyno Chart

Test engine: 355 small-block, ported Dart heads, 1 3/4″ headers, flat tappet cam, compression ratio 10.5 to 1. New style Team G manifold with stock 500 2 barrel Holley carb.

We conducted a series of dyno tests on several different types of 2 barrel carb adapters. We ran one of the cheep die-cast aluminum adapters versus our #105 and #114 phenolic adapters. As you can see below, the results are very interesting.

Our #105 adapter out performed the die-cast aluminum adapter by 8 to 24 horsepower throughout the entire rpm range.

Is saving a few dollars on a carb adapter worth losing 24 horsepower?