Brand-new high-flow reproduction 2-1/2" inlet catalytic converter for 1986-1987 Buick Grand National and Turbo Regal replaces GM# 25103338.
This performance catalytic converter is made in USA exclusively for Highway Stars and is not available anywhere else.
Using the newest technology available, we were able to produce a high-flow, performance catalytic converter that is about five pounds lighter than a GM factory original unit.
It is an exact fit replacement for a GM factory original unit, and hooks up just like the original/discontinued GM cat #25103338.
With our high-flow cat, there's no need to drive around in a stink-bomb anymore.
Best of all, what you see is exactly what you get.
The catalytic converter you receive:
- This Highway Stars product is an exact fit replacement part for stock systems
- It is NOT a universal aftermarket like what is found at other sites
- Highway Stars product will NOT DIFFER (even slightly) from our picture, so customers can be CONFIDENT WHEN PURCHASING FROM HIGHWAY STARS.
- Like a factory original unit, Highway Stars Cat does NOT have an air tube
Comes with a complete hardware kit (pictured) for stock inlet and outlet connections.\
This catalytic converter is approved in 49 US states, however; it is is not "CARB" approved. (California Air Resources Board)
Another Highway Stars exclusive "keep-em-original" restoration part!
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I installed the new catalytic convertor this morning and it took less than one hour. It fit perfectly and now I don't have to run in the house and change my smelly clothes after starting my Buick in the garage. Have not noticed any decrease in performance. The exhaust still has a nice throaty sound. Great job Highway Stars.
Finished installing the new catalytic convertor this morning and I absolutely love it. The exhaust still sounds nice and throaty and I found minimal loss of power versus the test pipe and of course I don't have to run into the house and change clothes from those obnoxious exhaust fumes when starting my Buick in the garage. Good job Highway Stars.
I am not one to write reviews but feel as though this warrants one. I have a low mileage 87" and while looking through what I could possibly replace on my car found this Catalytic Converter. For the price and the quality you will not find another one out there that's better! I think it took longer having all of us standing and comparing the new to the old than it took to install it . Top notch as usual Highway Stars thank You Again!!!!
Easy bolt up and installation with new hardware included. This converter fit inside of the factory converter's two piece outer shell (marked AC Delco) with light modifications, so appearance is almost the same now. Highway Stars, Thank you for taking the time to provide this product to Turbo Buick owner's.