"Acid Ported" Cast Iron Small Block Chevy & Small Block Ford Intake Manifolds

More Horsepower with stock look; even if the manifold is removed!

Acid intakes receive porting work to critical areas inside the manifold and are "acid ported" for 2 to 3 days. During the acid procedure, approximately 2 pounds of material is removed from the internal parts of the intake. The manifold retains a totally stock external appearance. What this means to you is that no one will ever know you have a modified intake.

When compared side-by-side to a stock intake, the acid modifications are virtually undetectable. Most engine builders find it difficult to identify one of our acid intakes from a stock manifold. Tested on the same test engine as our ported intakes, the acid intake showed an amazing gain of 8 horsepower at 4,500 rpm, and 13 horsepower at 6,500 rpm.

So, if you are looking for a substantial horsepower improvement and must retain a stock looking manifold due to track inspection, the Acid Ported Intake is the way to go.

“In the original form, the Chevy cast iron intakes were designed to run from idle to 3,000 rpm. However, on a race engine, they never see anything less than 3,500 rpm. This is the reason the stock intakes are so restrictive. As the dyno charts show, the addition of a Brzezinski intake will add 20 to 50 horsepower to your engine from 3,500 to 7,000 rpm. If you are interested in performance below 3,500 rpm, such as for a tow vehicle, keep the intake stock. If winning races is your goal, get a Brzezinski intake manifold.”

— Randy Brzezinski, Brzezinski Racing Products, Inc., Pewaukee, WI