Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy Nascar Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GMs popular LS engine are dominating the LS scene as well. Holleys products also include performance fuel pumps, intake manifolds & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies we can give you the edge you need over the competition!
This Holley EFI adapter is solid and feels well-made, but I think it's a tad overpriced for what it is. Still, it does the job and made my LS conversion smooth. Just wish it came with better instructions!
S
Sandra Kim
Not what I expected
I was really hoping this adapter would fit my setup perfectly, but it didn't quite line up as I thought it would. It looks good, but the installation was more complicated than planned. Disappointed.
M
Megan O'Sullivan
Decent but had a hiccup
The adapter itself is good and fits well, but I had some trouble aligning it with my throttle body. It took a bit of tweaking, but once installed, it performed just fine. Just be prepared for a little extra work!
T
Tommy Lee
Perfect fit for my project
Installed the Holley EFI adapter on my 4150 setup and it has been fantastic. The 92mm LS throttle body fits snugly, and I love how it improved the airflow. Highly recommend for anyone doing an LS swap!
J
Jorge Ramirez
Solid Adapter for LS Swaps
I used the Holley EFI adapter for my 4150 to LS throttle body swap and it worked like a charm. The fit was perfect and the build quality feels durable. Makes the install process so much easier for my project car!
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FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
