Type 4 Side IN - End OUT
What is a Type 4 Muffler?
Answer: A Type 4 Muffler can be round or oval shaped. The exhaust gas travels IN through the SIDE and OUT through the END. Both exhaust pipes are typically made with ID configurations. Sizes Range from 4" to 5" Pipe Sizes. The Inlet or Outlet Offset Position is the measurement from the bottom to the top. The clock position is used just like you would tell time.
Our pictures shown are just a representation of the type of the mufflers we sell.
Refer to the Chart Below to ensure you are getting the correct muffler for your truck.
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![Mack DM Muffler 10 x 15 Oval 4" Inlet 3.8" OD Outlet 16" long]( "Mack DM Muffler 10 x 15 Oval 4\" Inlet 3.8\" OD Outlet 16\" long")
![Mack DM Muffler 10 x 15 Oval 4" Inlet 3.8" OD Outlet 16" long]( "Mack DM Muffler 10 x 15 Oval 4\" Inlet 3.8\" OD Outlet 16\" long")
Mack DM Muffler 10 x 15 Oval 4" Inlet 3.8" OD Outlet 16" long
Grand Rock
OEM PRICE $362.50YOUR PRICE $290.00M-149 Mack DM Muffler 10" x 15" Oval 4" Inlet 3.8" OD Outlet 16" long *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We...GRCM-149OEM PRICE $362.50YOUR PRICE $290.00 -
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![8.5 x 36 with 3"ID in/out D14-0505 Muffler Style 6]( "8.5 x 36 with 3\"ID in/out D14-0505 Muffler Style 6")
8.5 x 36 with 3"ID in/out D14-0505 Muffler Style 6
ShuttleWorth
OEM PRICE $546.00YOUR PRICE $440.00D14-2070 8.5 x 36 with 3"ID in/out D14-0505 Muffler Style 6 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control...D14-2070OEM PRICE $546.00YOUR PRICE $440.00 -
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![15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine]( "15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine")
![15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine]( "15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine")
15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine Heavy DUTY
United Muffler
OEM PRICE $681.00YOUR PRICE $457.0072486L 15609879/1552174 GM Kodiak Topkick Muffler for 3116 CAT Engine *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We...UTD72486LOEM PRICE $681.00YOUR PRICE $457.00 -
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![12.3" x 15.2" Oval Muffler 27" Body 5" IN-OUT M-757]( "12.3\" x 15.2\" Oval Muffler 27\" Body 5\" IN-OUT M-757")
![12.3" x 15.2" Oval Muffler 27" Body 5" IN-OUT M-757]( "12.3\" x 15.2\" Oval Muffler 27\" Body 5\" IN-OUT M-757")
12.3" x 15.2" Oval Muffler 27" Body 5" IN-OUT M-757
Grand Rock
OEM PRICE $1,632.00YOUR PRICE $1,132.00M-757 Type 4 Muffler 12" x 15" x 27" 5"ID-ID M-757 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We encourage you to...GRCM-757OEM PRICE $1,632.00YOUR PRICE $1,132.00 -
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![M-751 International 10" x 15" Oval Muffler 4" Inlet - 5" Outlet]( "M-751 International 10\" x 15\" Oval Muffler 4\" Inlet - 5\" Outlet")
![M-751 International 10" x 15" Oval Muffler 4" Inlet - 5" Outlet]( "M-751 International 10\" x 15\" Oval Muffler 4\" Inlet - 5\" Outlet")
10" x 15" Oval Muffler for International 4" Inlet - 5" Outlet M-751 D13-7727
ShuttleWorth
OEM PRICE $607.00YOUR PRICE $388.00D13-7727 Type 4 Oval Diesel Muffler 10" x 15" Body 27" Body - 30" Overall 4" Inlet 5" Outlet *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace...SHWD13-7727OEM PRICE $607.00YOUR PRICE $388.00 -
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![Round Muffler 11" x 36" 4" IN-OUT]( "Round Muffler 11\" x 36\" 4\" IN-OUT")
![Round Muffler 11" x 36" 4" IN-OUT]( "Round Muffler 11\" x 36\" 4\" IN-OUT")
M-724 Type 4 Round Muffler 11" x 36" 4" IN-OUT
ShuttleWorth
OEM PRICE $384.00YOUR PRICE $322.00M-724 Type 4 Universal Use Muffler 11" x 36" 4" IN-OUT M-724 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We encourage...SHWD13-0034OEM PRICE $384.00YOUR PRICE $322.00 -
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![M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4" IN-OUT]( "M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4\" IN-OUT")
![M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4" IN-OUT]( "M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4\" IN-OUT")
M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4" IN-OUT
Grand Rock
OEM PRICE $812.00YOUR PRICE $442.00M-626 Type 4 Muffler for Thomas School Bus 11 x 33.5 4" IN-OUT M-626 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We...GRCM-626OEM PRICE $812.00YOUR PRICE $442.00 -
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![M-625 Type 4 Bluebird Bus Round Muffler 11" x 42" 4"IN-OUT]( "M-625 Type 4 Bluebird Bus Round Muffler 11\" x 42\" 4\"IN-OUT")
![M-625 Type 4 Bluebird Bus Round Muffler 11" x 42" 4"IN-OUT]( "M-625 Type 4 Bluebird Bus Round Muffler 11\" x 42\" 4\"IN-OUT")
M-625 Type 4 Bluebird Bus Round Muffler 11" x 42" 4"IN-OUT
Grand Rock
OEM PRICE $811.00YOUR PRICE $451.00M-625 Type 4 Muffler 11" x 42" 4"ID-ID M-625 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment. We encourage you to check...GRCM-625OEM PRICE $811.00YOUR PRICE $451.00 -
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![25159367 Mack DM Oval Muffler 10" x 15" Oval 4" IN & 5" OUT]( "25159367 Mack DM Oval Muffler 10\" x 15\" Oval 4\" IN & 5\" OUT")
![25159367 Mack DM Oval Muffler 10" x 15" Oval 4" IN & 5" OUT]( "25159367 Mack DM Oval Muffler 10\" x 15\" Oval 4\" IN & 5\" OUT")
25159367 Mack DM Oval Muffler 10" x 15" Oval 4" IN & 5" OUT D13-2070
ShuttleWorth
OEM PRICE $568.11YOUR PRICE $325.00D13-2070 Mack DM Oval Muffler 10" x 15" Oval 4" IN & 5" OUT D13-2070 SW-D13-2070 25159367 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace...SHWD13-2070OEM PRICE $568.11YOUR PRICE $325.00 -
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![M-526 10" Round Muffler for GMC Brigadier and Astro 5" IN-OUT]( "M-526 10\" Round Muffler for GMC Brigadier and Astro 5\" IN-OUT")
![M-526 10" Round Muffler for GMC Brigadier and Astro 5" IN-OUT]( "M-526 10\" Round Muffler for GMC Brigadier and Astro 5\" IN-OUT")
M-526 10" Round Muffler for GMC Brigadier and Astro 5" IN-OUT
Grand Rock
OEM PRICE $764.00YOUR PRICE $427.00M-526 Type 4 Muffler GMC Brigadier and Astro 10" x 44.5" 5" ID In-Out M-526 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment...GRCM-526OEM PRICE $764.00YOUR PRICE $427.00 -
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![M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11" Round 36" long]( "M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11\" Round 36\" long")
![M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11" Round 36" long]( "M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11\" Round 36\" long")
M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11" Round 36" long
Grand Rock
OEM PRICE $490.41YOUR PRICE $391.41M-034 M-034 Type 4 Muffler Bluebird-GMC Bus 4 IN-OUT 11" Round 36" long M-034 *This is a replacement muffler intended for sound control only or strictly to replace an existing muffler. It does not alter or replace emissions-control equipment...GRCM-034OEM PRICE $490.41YOUR PRICE $391.41
