CPC Norwood

For example the big exhaust clamp at the muffler on the big single systems from the late 1980's.

Clamp NOS part assy number #3634389 which includes clamp 11257765 and 257766 hardware set including washer and nut 2436164 and 11501033.

CPC Norwood

The Factory also used Clamp assembly 1257765 and 1257766 so that is good.

Here's the difference... The assembly used at the factory used a nut with a capive washer which needs to be sourced seperatly to be correct.

chazman

iTrader: (4)

Thanks for posting that!

TTOP350

iTrader: (8)

Nice to have that detailed info, thanks!

CPC Norwood

Here is another comparison... The big clamp at the converter originally was part # 14089474. This clamp was superceeded by # 15529483, both clamps are identical on a visual from the faces.

CPC Norwood

The difference is on the sides. Factory clamp has a welded seam. Superceeded clamp is tacked at the top and the bottom.

FJA1791

iTrader: (3)

Can you tell me what size this clamp is? 2.50 or 2.75. Thanks, Frank

LeonardS

He has been banned from the site, so he won’t be responding.

GarageToys

iTrader: (6)

The exhaust clamp #1257766 is listed as 2-1/4": https://www.corvettecentral.com/c3-6...e-clamp-322151

The catalytic converter clamp #15529483 is listed as 3" : https://www.wheelerfleet.com/product...3-clamp/115644

Google

FJA1791

iTrader: (3)

Garage Toys, Can’t be 2 1/4. My 84 HO Z-28 original muffler is 2.50 inlet and 2.25 tail pipes. I also thought some factory original exhausts were 2.75.