tmctguer

for anyone who might own an early 1954 Corvette, or might be familiar with NCRS judging guidelines, i would like some assistance. how far should the rear exhaust chrome "tips" protrude from the rear bumper?

i am about to buy some exhaust extension on eBay (from a reputable seller) to replace the non-factory tips that are on the car. but i need to know how far the replacement tips should protrude from the rear bumper so i can give some instructions to my local muffler shop on creating a mating flange that will result in the correct fit.

thanks in advance for any help someone can provide.

vettecityman53

The original extensions with the straight cut stuck out about 1-1/2" to 2". Be careful about buying reproductions as they can be detected in judging, they are a slightly different color than originals.

vettecityman53

....and what do you mean by this? The exhasut pipes slip into the extensions which are held by two brackets bolted by three bolts into the body in the vertical section of the trunk floor on either side of the spare. There are two of these brackets on the underside of the body which have 'clamps' which encircles the extension, a cross-bolt holds the extension in-place and at the proper spacing. Do you have these brackets on your body? On the underside of the car, the exhaust extension (part you won't see) has a 'donut' with four prongs to secure the exhaust pipe and center it as it enters the extension. Look at Noland Adam's book for reference......there shouldn't be any 'flange' for joining the pipe to the extension, it slips in.

tmctguer

vettecityman53: good question about "mating flange". i probably have jumped the gun in assuming the exhaust tips i've seen on eBay need to be mated via a flange to the exhaust pipes. i made that assumption by looking at photos of them, and wondering how they connect to the exhaust pipes. i will look at the underside of the exhaust this weekend, and check for the parts you mention.

as you can probably tell, i just purchased a '54 Vette and am getting to know the vehicle.

thanks for your detailed description of the parts, and how they connect. i will re-post if i need further info.

1955 copper

tmctguer

i DO have the clamps on my car (the ones in the picture). but i have non-stock exhaust tips in place (i spoke with the prior owner). i will need to purchase the early '54 exhaust tips and replace the non-stock ones with stock units.

TroyPyles

You will have to remove the tail pipes to install the new exhaust extensions.