🌪️ Spectre Performance SPE-9849 4 Inch Single Air Intake Plenum: Powerful Airflow and Performance Boost Review

They work well for a N/A engine but for boosted applications after about 6lbs they don't work very well due to heavy turbulence. Switched to extreme speed and got a little more horsepower, but good for low boost.

Clean chrome look and fits perfectly on my Edelbrock 1906 with no problems. It also fits under the hood of the 89 F150 4.9L. As for the casting issues that others found in the chamber itself, that wasn't a problem for me as the engine it runs on doesn't need to count every second and count cfm.

I like that what I saw online matches what was delivered to my door. I used this to integrate my 73 foot GMC's cold air intake system from the front of the truck to the air box and the two-barrel Holley 2300 carburetor. The fit was excellent and the product worked as expected. It also fits most 4bbl carburetors that I may use later. It was a bit expensive for its purpose, but it was worth it in the end.

After trying to make a blower chamber out of stainless steel I ran out of time and decided to try this to install cold air on my jeep station wagon with amc360 v8. Wanted to use a Napa 6637 filter or something similar (it's a massive filter that the diesel guys use on Ford 7.3L and Cummins 5.9 to create cold air intakes with a dry replaceable filter). I live in the high desert of Southern California and wanted to use a dry filter element but wanted more surface area. It sits perfectly on my…