New CAT 4W1237 Turbocharger Caterpillar Aftermarket for CAT 3412, 3412C, SR4 and more

This part was designed and developed to meet U.S OEM Specifications. Final quality control was completed at our ISO 9001 Certified U.S. facilities to ensure this part fits and performs just like the original part.

If this part number is not from your original unit, a parts book or your CAT dealer, then please check with us before finalizing your order. You can chat with us online or send a short email. Please provide your Engine Serial Number - Usually located on the Engine Valve Cover or Engine Block Tag.

As a courtesy to our customers, we operate a 30 day no hassle return policy. 

In addition to no hassle returns, your purchase of this part includes a 1 year, unlimited mileage warranty.

Orders placed weekdays, by 3pm EST, ship out same day.

The tracking number for your order will be emailed within 24 hours - Typically the next weekday morning after your order is placed.

Saturday delivery is an option for certain locations. Please email us if you selected 2-Day or Overnight shipping and require Saturday delivery.

We have served customers in over 90 countries. We offer discounted courier (DHL and Fedex) rates on most parts. If international courier shipping rates are unavailable for your country, please email salessupport@propelparts.us, for discounted Air Freight options.

Through our Paypal partnership, we accept all major Credit/Debit cards. This partnership ensures that your data is protected with SHA-256 SSL encryption - the highest level commercially available. Simply put, when you shop on our website, you can shop with peace of mind that your data is 100% secure.

The price you see is the price you pay. There are no core charges and we only charge Tax for customers in Texas - Our Headquarter location. If you are Tax Exempt in Texas, enter your Tax Exempt number on checkout to avoid charges.

In addition to Debi/Credit cards, we accept Bank Wire Transfers for international customers. Just select 'Bank Wire Transfer' on the checkout page. International customers are responsible for country specific Duties and Taxes.

And if you need flexible payment terms, we offer the option to BUY NOW, PAY OVER TIME. Payments are interest free, if paid in 6 months. Note: Only available to U.S. customers, on orders over $99. Select 'Paypal Credit' when you checkout.