Holley 121-128 Accelerator Pump Discharge Nozzle
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There is a stamp on the side detailing the size of the part number which is the last two figures.
Selected User Reviews For Holley 121-128 Accelerator Pump Discharge Nozzle
Providing quick shipping and excellent customer service I am pleased with the product.
It is equipped with a holley 750 and a bone stock 350 sbc.
Rather, it comes in a generic-looking bag. Even so, they are still perfectly functional and fit. It is a smooth and crisp acceleration for me.
It's efficient. It's suppose to be efficient. I need a longer screw with it.
There is no other way to describe this accelerator pump, it works like a charm. Here's a tip on how to install it Use needle nose pliers to put the screw through the nozzle and into the gaskets, use Vaseline or axle grease to stick the gasket to the bottom of the nozzle, and carefully lower into position.
A pair of shoes is included. A single pumper carburetor is all you need unless you have a double pumper. I wish they sold single packs for a lower price. Having spares is always a good idea,.
Item worked as advertised and was a perfect fit.
A tuning procedure for the accelerator pumps on a Holley double pumpers.
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