
Flange Adapter HX40 to HE351
š ļøāÆHX40 to HE351 Turbo Flange Adapter ā 4.00" to 4.375" Stainless Transition | 1" Thick
ThisāÆStainless Diesel HX40 to HE351 Flange AdapterāÆallows you to seamlessly connect an HX40-style 4.00" downpipe to an HE351 4.375" turbo outletāperfect for turbo swaps or custom exhaust builds on 3rd Gen Dodge Cummins trucks.
CNC-machined from high-quality steel, this 1" thick flange-to-flange adapter bridges the gap between two different turbo flange styles, making it easy to run your existing HX40 downpipe with a stock HE351 turbo or vice versa.
šāÆKey Features & Benefits:
ā
āÆAdapts HE351 Turbo Outlet (4.375") to HX40 Downpipe (4.00")
ā
āÆPerfect for Common Rail Cummins Turbo Swaps
ā
āÆ1.00" Thick Flange-to-Flange Design ā Provides secure, durable transition
ā
āÆCNC-Machined Steel ā Strong, warp-resistant, and weldable
ā
āÆEliminates the Need to Fabricate or Replace Your Entire Downpipe
š¦āÆWhatās Included:
-
(1) HX40 to HE351 Flange Adapter (1" Thick)
ā
š„ Turbo swap made easy. Adapt your downpipe without the hassleāadd this flange adapter to your build today.
Pairs well with
Ships within 1-2 business days.
Free shipping & returns

Flange Adapter HX40 to HE351
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQās
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
Free Shipping
Premium Parts
Fitment Guaranteed
FAQs
Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures youāre getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You donāt need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers likeĀ Turbo Tech Performance.Ā Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. Itās crucial to ensure compatibility with your vehicleās make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if youāre unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturerās warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.


