Description of π Holley 121-5 Accelerator Pump Nozzle Check Needle Set of 2 - Ultimate Performance Enhancement!
Replacement pump discharge needles. For all Holley 4150, 4160, and 4500 series carburetors. Made from quality materials. Easy installation. Durable and long lasting. Fit type: Vehicle Specific.
This product is absolutely useless. I wasted my money on this, as it did not improve the performance of my car at all. The only good thing about it is that it is easy to install. However, I regret buying this as it provided no noticeable benefits to my car's exhaust system.
Top quality. These needles are not included in carburetor rebuild kits. But this professional seller had it in stock and delivered it within 3 days. Wow. We highly recommend it.
The smaller the part, the more important it is to install correctly. They weren't in the used carburetor I bought. I am grateful that Holly sells them individually without a prescription.