 Muffler ID |
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| DennisV |
  Nov 23 2023, 09:19 AM
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#1
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Senior Member  Group: Members Posts: 554 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California 
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Can someone help me identify this muffler? I could not find a part number on it. Reviewing pictures online, the 914-6, early 911, and even 912 look very similar. Are there measurements I can take to confirm? I don't have an assembled car to trial fit it on.
Did I mention it is hanging about 10 feet up on a wall with headers attached? Not certain if the headers are meant for the muffler. I can pull down if necessary.  |
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| bdstone914 |
Nov 23 2023, 09:31 AM
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#2
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bdstone914 Group: Members Posts: 4,725 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Looks like an aftermarket lre 74 911 / 914-6 muffler. The exhaust tip does not look like a stock muffler. Desireable two in one out type. Does it rattle when you shake it? Should be worth good money to the right buyer
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| johnhora |
Nov 23 2023, 02:06 PM
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#3
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Senior Member Group: Members Posts: 874 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None
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Looks like the Leistritz muffler I have which has a 1969 date code...the one on the bottom....Leistritz and the Bischoff mufflers were factory installed....you can usually find a date code and model # stamped in on the bottom of the factory muffler....the 911 models tip have a downward and outward angle....the 914-6 model tip is more straight backward. You can see the the tip angle better on the 1972 Bischoff muffler on the top and the tip is a smooth pipe like most mufflers.
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| johnhora |
Nov 23 2023, 02:11 PM
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#4
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Senior Member Group: Members Posts: 874 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None
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The date code is usually located on the bottom... on the side opposite the outlet tip and near the inlet pipe
Your muffler looks in pretty good shape so you should be able to find the numbers. |
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| porschetub |
Nov 23 2023, 06:14 PM
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#5
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Advanced Member Group: Members Posts: 4,745 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(johnhora @ Nov 24 2023, 08:11 AM)  The date code is usually located on the bottom... on the side opposite the outlet tip and near the inlet pipe Your muffler looks in pretty good shape so you should be able to find the numbers. Great info John ,the 911 muffler is a non fit due to tail pipe angle with a stock rear valance , PO supplied 911 one had the conversion pipe welded on but rather large sorted a stainless tip modified to fit ,looks overkill but not loud .  Not sure about the crimped bend on the pic supplied as not seen that before ,however if this one Dennis has proves be ok and the factory chrome tip fits it should be fine . Not like you can pick and choose on a genuine unit unless you have a very fat cash supply ,don't expect to many NOS units around ? . Cheers. |
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| dr914@autoatlanta.com |
Nov 24 2023, 09:00 AM
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#6
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914 Guru Group: Members Posts: 8,105 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
reproduction early 64-73 911
QUOTE(DennisV @ Nov 23 2023, 08:19 AM) Can someone help me identify this muffler? I could not find a part number on it. Reviewing pictures online, the 914-6, early 911, and even 912 look very similar. Are there measurements I can take to confirm? I don't have an assembled car to trial fit it on. Did I mention it is hanging about 10 feet up on a wall with headers attached? Not certain if the headers are meant for the muffler. I can pull down if necessary. |
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| DennisV |
Nov 25 2023, 07:01 AM
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#7
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Senior Member Group: Members Posts: 554 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California
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QUOTE(johnhora @ Nov 23 2023, 12:06 PM) Looks like the Leistritz muffler I have which has a 1969 date code...the one on the bottom....Leistritz and the Bischoff mufflers were factory installed....you can usually find a date code and model # stamped in on the bottom of the factory muffler\ Good eye John. Thanks for your suggestion regarding date code and model. I took another pass and found this obscured by a lot of dust. 901.011.08/04 70 901/1 I guess this makes it a Leistritz for 911/12 from April 1970.  |
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| rgalla9146 |
Nov 25 2023, 11:55 AM
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#8
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Advanced Member Group: Members Posts: 4,661 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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I'm surprised to see such a wrinkled tailpipe on an OE Leistritz.
It is 911 only. 912s are quite different. OEM '6' Leistritz shown. Found on bottom of muffler toward tailpipe side Attached thumbnail(s) 
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