HPM Welded Turbo Mufflers


HPM Welded Turbo Mufflers 5-1/2" x 11" Oval Body

Double-wrapped welded aluminized mufflers with two baffles and cores (most configurations). The double wrapped shell helps to give a quieter sound than single-wrapped welded turbos.  Mufflers are reversible.  These have a 5-1/2" x 11" oval body and are available in 14" or 18" body lengths.  These are our quietest, especially the 18", performance muffler, and have a nice flow rate for a turbo muffler.  The # 1142 was flow tested at 222 cfm at 10" of water.

Part # Inlet/Outlet Body OAL    
Part # Inlet/Outlet Body OAL
1112 2" single offset 14" 19"
2112 2" single offset 18" 23"
1122 2-1/4" single offset 14" 19"
2122 2-1/4" single offset 18" 23"
1132 2-1/2" single offset 14" 19"
2132 2-1/2" single offset 18" 23"
1142 3" single offset 14" 19"
2142 3" single offset 18" 23"
1212 2" double offset 14" 19"
2212 2" double offset 18" 23"
1222 2-1/4" double offset 14" 19"
2222 2-1/4" double offset 18" 23"
1232 2-1/2" double offset 14" 19"
2232 2-1/2" double offset 18" 23"
1242 3" double offset 14" 19"
2242 3" double offset 18" 23"
1323 2-1/4" single/dual 14" 19"
2323 2-1/4" single/dual 18" 23"
1333 2-1/2" single/dual 14" 19"
2333 2-1/2" single/dual 18" 23"
1343 3" single/dual 14" 19"
2343 3" single/dual 18" 23"
1353 2-1/2" single/2-1/4"dual 14" 19"
2353 2-1/2"single/2-1/4"dual 18" 23"
1363 3" single/2-1/4" dual 14" 19"
2363 3" single/2-1/4" dual 18" 23"
1373 3" single/2-1/2" dual 14" 19"
2373 3" single/2-1/2" dual 18" 23"





2424 2-1/4" dual/dual 18" 23"





2434 2-1/2" dual/dual 18" 23"
sound clip is on a 2001 GM Silverado 5.3L regular cab long box pickup truck.



HPM Welded Turbo Mufflers 4" x 9" Oval Body

Smaller 4" x 9" body size where space is a concern.  Aluminized mufflers have a double-wrapped shell, 409 s/s are single wrapped, and made entirely of 400 series stainless steel.  Both aluminized and 409 s/s contain 2 perforated 409 s/s 2-1/4" cores and s/s inner baffles for good exhaust flow and a powerful sound.  These mufflers are fully welded and are reversible.  Flow tested at 10" of water.  An IMCO # T-906 flowed at 157 cfm, and a # T-904 at 156 cfm at 10" of water for comparison.

409 S/S #
Aluminized #
Inlet/Outlet
Body
OAL
Flow
4491112
491112
2" single offset
14"
19"

4491122
491122
2-1/4" single offset 14" 19" 190 cfm
4491132
491132
2-1/2" single offset 14" 19"
4491212
491212
2" double offset 14" 19"
4491222
491222
2-1/4" double offset 14" 19" 185 cfm
4491232
491232
2-1/2" double offset 14" 19"