My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Diamond Eye Manufacturing 420042 Exhaust Adapter ID to OD Aluminized Steel - 3.5in 4in

Manufacturer

Picture for manufacturer Diamond Eye Manufacturing

Part Number

420042
10 reviews
Sale Price

$26.22

Estimated ship date Tuesday, December 22

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Diamond Eye Manufacturing 420042 is a precision-engineered exhaust adapter designed to connect exhaust components with different diameters. This adapter features a 3.5-inch inner diameter (ID) that expands to a 4-inch outer diameter (OD), allowing seamless integration of exhaust pipes and components in custom exhaust systems.

Key Features:

  • 3.5-inch inner diameter to 4-inch outer diameter transition
  • Aluminized steel construction for corrosion resistance and durability
  • Precision-formed for proper fitment and exhaust flow
  • Ideal for diesel truck exhaust system modifications and repairs
  • Compatible with various exhaust pipe configurations

This exhaust adapter is manufactured by Diamond Eye, a trusted name in performance exhaust systems for diesel trucks and heavy-duty vehicles. The aluminized steel construction provides excellent resistance to heat and corrosion while maintaining affordability. Perfect for custom exhaust fabrication, system upgrades, or replacement applications where diameter transitions are needed.

excellent web site very easy to use and fast delivery

A few items could have a better description.

Best price ever, easy to order

Lowest price with shipping online

ordering process easy, good comparison shopping, spent 2 hours looking at these parts and this has been best deal today.

They had the best price I could find, anywhere, for Royal Purple HPS oil (and I spent hours searching). I ordered a case on Sunday night and it arrived on Wednesday (standard shipping) from half-way across the country. For standard shipping, that's pretty fast. They must have send it out early Monday morning, at the latest.<br><br>I'm very satisfied with my experience, and I'll definitely be ordering from them again, when I need another case of oil.

very simple, very easy to order

Superb company! Autoplicity had the lowest price, shipped it quickly, and it was exactly as advertised - couldn't ask for better results!

Great price! Can't wait to see how the rest of the transaction goes.

lowest price I could find ANYWHERE. Website needs some work (login screen appears to be asking you to login again after you enter account info).

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy