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 420040 3.5 In. to 4 In. Stainless Steel Exhaust Adapter

Manufacturer

Picture for manufacturer Diamond Eye Manufacturing

Part Number

420040
20 reviews
Sale Price

$33.34

Estimated ship date Saturday, November 28

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 420040 is a precision-engineered stainless steel exhaust adapter designed to connect 3.5-inch inside diameter (ID) exhaust pipe to 4-inch ID exhaust pipe. This adapter provides a smooth transition between different pipe sizes, ensuring optimal exhaust flow and preventing turbulence in your exhaust system.

Key Features:

  • Constructed from high-quality stainless steel for superior corrosion resistance and longevity
  • Transitions from 3.5-inch ID to 4-inch ID pipe diameter
  • Smooth interior design minimizes exhaust flow restriction
  • Precision-manufactured for reliable, leak-free connections
  • Ideal for custom exhaust builds and aftermarket exhaust system modifications

This exhaust adapter is perfect for diesel and gas performance applications where connecting different exhaust pipe sizes is required. The stainless steel construction ensures long-lasting durability even in high-temperature exhaust environments, making it suitable for trucks, SUVs, and performance vehicles.

I will use this vendor more. Prices are very competitive. I wonder do you price match?

Easy to use site! Great pricing and free shipping!

Thanks ....

ALL GOOD

Awsome

Fast shipping, very happy with product.

.

Not only did you have my hard-to-find or out-of-stock item, you had thirty-five of them. I only needed one and your price was great and the delivery time was good. I did contact your customer service department and spoke with Jennifer V. She added to a very pleasant shopping experience. Thank you.

Best prices

good

I had a great experience ordering my springs through Autoplicity. I received instant notification of my order as it was placed. I was very happy to see shipping information so quickly after the order was placed, also. Last, but not least, I received the springs SO FAST! Best price, instant notification of order status, fastest shipping, therefore best review that I can write! Thanks, Autoplicity, I will be a return customer if I need anything else!

Product was exactly as described. Rob@Autoplicity was great when I had an issue with packages being stolen from my porch and got it delivered to a secure site. Great company and will order from again when I need parts for my Acura.<br><br>Disclaimer: 5 star rating seems cliche but this was exactly what I hope for in online purchase experiences.

What a good find, very satisfied. Good prices, good service. Will be ordering from Autoplicity in the future.

Crazy fast shipping. By far the best price of anywhere. The thule bike rack we ordered was in stock, lowest price, easy checkout process, and the company really appears to run an organized, professional business. Very happy with the level of service. We will definitely make sure to use autoplicity in the future.

Great

Autoplicty had the best price by far for a transmission. Fast shipping too!<br>UNFORTUNATELY...FED-EX beat the hell out of it! It was hanging out of the box when it arrived but was not damaged other than a few scrapes. Fed-Ex is not the best way to ship 140lbs...they can't lift it! Oh, and they can't comprehend "this side up" either!

Couldnt order without logging into amazon

So far so good

thank you'

Good price and in stock !

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