These are the 4 bolts required to mount the Exhaust System to the Exhaust Manifolds 4 Bolts for $8.00 Fits 400 / 430 / 455 Note: Over the years if your Factory Exhaust has been worked on it probably has Studs at the end of the Exhaust Manifolds. These work fine but are incorrect. If you want the correct hardware on your car then these are it! I have a bunch of Hardware Kits for your Buick . . . . see more at www.Stage1Restoration.com ! I accept Pay Pal and all major Credit Cards. Order by phone by calling (715) 874-6037 Shop Hours Monday - Friday 1 pm to 6 pm Central time. Thanks for Looking, Best Fastener Collection in the country for 1970 - 1972 Buick GS, GSX & Skylark! And Made in the USA. Don't like dealing with the Big Name Retailers? Give me a shout. I'll be happy to help and share 30 + years of experience in Racing & Restoring Buick Muscle Cars.
I think most Manifolds over the years ended up having studs installed during "engine rebuilds" and "exhaust work" but if you look at the diagram I posted you'll see in the circled section that they are suppose to have the Bolts. Gardner sends out bolts with his Exhaust Kits also. I should also note that the Diagram I posted is for the GS 455. The 350 Engines may have used studs. .
