---
product_id: 61139858
title: "Demon 1921 Street Demon Calibration Kit"
brand: "demon"
price: "€ 246.78"
currency: EUR
in_stock: true
reviews_count: 3
url: https://www.desertcart.it/products/61139858-demon-1921-street-demon-calibration-kit
store_origin: IT
region: Italy
---

# Precision Metering Customizable Jets Made in USA Demon 1921 Street Demon Calibration Kit

**Brand:** demon
**Price:** € 246.78
**Availability:** ✅ In Stock

## Summary

> 🚀 Tune In, Rev Up Your Ride!

## Quick Answers

- **What is this?** Demon 1921 Street Demon Calibration Kit by demon
- **How much does it cost?** € 246.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/61139858-demon-1921-street-demon-calibration-kit)

## Best For

- demon enthusiasts

## Why This Product

- Trusted demon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight Design:** Weighing in at just 0.400 pounds for easy handling.
- • **Compact & Convenient:** Perfectly sized at 3.302 H x 17.78 L x 8.128 W cm for storage.
- • **Tailored Performance:** Includes a variety of metering rods and jets for optimal tuning.
- • **Quality You Can Trust:** Proudly made in the USA for superior craftsmanship.
- • **Unleash Your Engine's Potential:** Transform your ride with precision calibration.

## Overview

The Demon (1921) Street Demon Calibration Kit is a comprehensive tuning solution featuring an assortment of metering rods, jets, and step-up springs, designed to enhance your vehicle's performance. With a compact size and lightweight design, this kit is perfect for enthusiasts looking to optimize their engine's capabilities. Proudly made in the USA, it combines quality and precision for the ultimate driving experience.

## Description

Demon 1921 Street Demon 625 Calibration Kit

## Features

- Features Assortment Of Metering Rods/Jets/Step Up Springs
- Package Dimensions: 3.302 H x 17.78 L x 8.128 W (centimeters)
- Package Weight: 0.400 pounds
- Country of Origin : United States

## Images

![Demon 1921 Street Demon Calibration Kit - Image 1](https://m.media-amazon.com/images/I/71yx6vgWgbL.jpg)

## Customer Reviews

### ⭐⭐⭐ 







  
  
    doesn't have the jets I need.
  

*by D***? on Reviewed in the United States 🇺🇸 on January 18, 2023*

had to by additional jets for my secondaries. carb is a pain to tune.

### ⭐⭐⭐⭐⭐ 







  
  
    I have a 1966 Pontiac 2+2 with a 421 (now 429 with the overbore) and this carb works very nicely on the engine
  

*by A***R on Reviewed in the United States 🇺🇸 on September 9, 2015*

This tuning kit for the Street Demon 625 CFM carburetor has all you need to tailor the carb to your engine. I have a 1966 Pontiac 2+2 with a 421 (now 429 with the overbore) and this carb works very nicely on the engine. In my case, the best tune was just to use the "richest" parts in the kit. I ended up with the biggest jets on both the primary and secondary side and the thickest step-up springs. The step-up rods are the next to richest set. Most people would have used the 750 CFM carb on an engine this size, but I prefer the low speed drivability of the smaller carb over the few extra horses on top. Besides that, this carb is already 75 CFM more than the original Carter AFB. Out of the box, the carb is probably tuned very well for a 350-ish sized engine with a relatively short stroke; which was way too lean for my engine. Many people with engines in the 300-400 cubic inch range can just bolt this carb on and go. All in all, I love the carb and this kit was an absolute necessity for my particular engine. You may not need the tuning kit, but if you do it is invaluable.By the way, this kit includes all of the original stock jets and step-up rods. This is a great idea in case you do not have a new carb to tune or you somehow lost some parts. Others have criticized this as a waste of money, but it is worth it in my opinion.

### ⭐ 







  
  
    Poor quality control
  

*by J***. on Reviewed in the United States 🇺🇸 on July 22, 2021*

Box was not taped closed.  One of the metering rods is missing and one was bent.

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---

*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-05-15*