Very happy with Holley service with this 1904 demon, I have on my other corvette the 1904bk series and will say descent out the box. With a few changes to the metering rods/springs that take a few minutes and adjustment of spring flap in the rear woke it up. So I ordered the 1904 for my other ls swap corvette that's in the process. 5 stars all around one thing you have to be carefully not to over tighten the rear flap holding nut or it will break on the 1904-bk one. Had to take it apart and was surprised how easy it was and still looked clean inside after being on for 3 years and almost 100 trips down the track. For now on this is the only carb I will buy for the simplicity and good looks
Verified purchase: Yes | Condition: Pre-owned
Replaced the Edelbrock performer carb on a 400ci Bronco with this 750cfm model. Installation was straight forward with no surprises. DO remember to install the metal gasket plate and two paper gaskets for correct operation of a Demon carb. Final checks complete, turned key in the ignition and, as soon as fuel had filed the carb the motor sprung into life. No second attempt, no need to pump the accelerator. Smooth idle and the motor "sounded" much stronger than any carb I have tried on the 400 before. My Bronco is a daily driver but am very happy with the improved throttle response from rest and the ability to see higher rpm with the stock set up
Verified purchase: Yes | Condition: New
Big difference in quality, performance and adjusting it. Love it and I wasn't sure how it would perform, but it blew me away. We are getting a 625 for my stepson's 289 sbf and can't wait.
Verified purchase: Yes | Condition: New
great looking carburetor easy install makes my engine run like new.
Verified purchase: Yes | Condition: New
car started right up on the 1st try, something it has not done in a long time
Verified purchase: Yes | Condition: New
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