heat riser part#
Race Director
Joined: Oct 2000
Posts: 12,628
Likes: 3,099
From: Shamong, NJ
Chevrolet part numbers before 79-80 were either 6 or 7 numbers, without any breaks and usually started with "3". From about 1980 on, new part numbers were 8 numbers with no breaks and started with "14".
15-6844 may be an AC Delco part number since they are often hyphenated, but if it is it's a discontinued number because it doesn't turn up on a search at Delco's website. If I get a chance later I'll see if I can find one of my old paper Delco catalogs and see if it's listed.
15-6844 may be an AC Delco part number since they are often hyphenated, but if it is it's a discontinued number because it doesn't turn up on a search at Delco's website. If I get a chance later I'll see if I can find one of my old paper Delco catalogs and see if it's listed.
Race Director
Joined: Mar 2017
Posts: 11,885
Likes: 4,470
From: Virginia
If you have it out of the car, NEVER put it back in.
If you want, you can put a blank spacer in there to make up the difference. Either modify yours, or buy one of these:
2" https://www.zip-corvette.com/58-74-2...pe-spacer.html
2.5" https://www.zip-corvette.com/62-69-2...pe-spacer.html
If you want, you can put a blank spacer in there to make up the difference. Either modify yours, or buy one of these:
2" https://www.zip-corvette.com/58-74-2...pe-spacer.html
2.5" https://www.zip-corvette.com/62-69-2...pe-spacer.html
Race Director
Joined: Nov 2006
Posts: 13,146
Likes: 7,760
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Couldn't agree more. Lose that horrible thing. You can put in a spacer, or sometimes that's not even needed. Enough slack in the exhaust to just pull it up that little bit. Depending on the exhaust system to be certain.
If you do run the car in sub zero weather. Perhaps it could be useful for quicker warm ups. If your still running the stock intake manifold and it's not all blocked up with carbon.
If you do run the car in sub zero weather. Perhaps it could be useful for quicker warm ups. If your still running the stock intake manifold and it's not all blocked up with carbon.
Melting Slicks
Joined: Sep 2016
Posts: 2,191
Likes: 955
From: Wauconda IL
Le Mans Master
Joined: Jun 2019
Posts: 7,641
Likes: 2,461
From: Indiana
Part number recommended seems correct.
i suggest spacer as it gives more clearance to starter but as mentioned has enough slack.
i rn cold weather and it adds time to choke warm up but not enough to care.
note the spacer i got needed the holes enlarged…
i would not put one back on that unless judging?
i suggest spacer as it gives more clearance to starter but as mentioned has enough slack.
i rn cold weather and it adds time to choke warm up but not enough to care.
note the spacer i got needed the holes enlarged…
i would not put one back on that unless judging?
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