Heartthrob Velocity Series Mufflers


Double-wrapped welded aluminized mufflers with two baffles and one center v-baffle (most configurations). The double-wrapped shell helps to give a quieter sound than single-wrapped performance mufflers. Mufflers are not reversible, body sizes are 5-1/2" x 11" oval, or 4" x 9" oval.  The 5-1/2" x 11" oval mufflers are shaped like our HPM turbo mufflers on the outside, but should be used when you are looking for a slight increase in noise and a higher exhaust flow.  This muffler has a much lower level of resonance and drone in the cab when compared to other straight through performance mufflers. It is loud upon accelleration, but quiet at speed. This is due to the double-wrapped shell, which is virtually non-existent on performance mufflers from our competition.

5-1/2" x 11" Oval Body Mufflers

Part # Inlet/Outlet Body OAL    
Part # Inlet/Outlet Body OAL
54000
2" center in/out 14" 19"
58000
2" center in/out 18" 23"
54011
2-1/4" center in/out 14" 19"
58011
2-1/4" center in/out 18" 23"
54022
2-1/2" center in/out 14" 19"
58022
2-1/2" center in/out 18" 23"
54044
3" center in/out 14" 19"
58044
3" center in/out 18" 23"
54055
3-1/2" center in/out 14" 19"
58055
3-1/2" center in/out 18" 23"
54066
4" center in/out 14" 19"
58066
4" center in/out 18" 23"
54077
5" center in/out 14" 19"
58077
5" center in/out 18" 23"
54100 2" offset in/center out
14" 19"
58100 2" offset in/center out 18" 23"
54111 2-1/4" offset in/center out 14" 19"
58111 2-1/4" offset in/center out 18" 23"
54122 2-1/2" offset in/center out 14" 19"
58122 2-1/2" offset in/center out 18" 23"
54144
3" offset in/center out 14" 19"
58144 3" offset in/center out 18" 23"
54200 2" center in/offset out 14" 19"
58200 2" center in/offset out 18" 23"
54211 2-1/4" center in/offset out 14" 19"
58211 2-1/4" center in/offset out 18" 23"
54222 2-1/2" center in/offset out 14" 19"
58222 2-1/2" center in/offset out 18" 23"
54244 3" center in/offset out 14" 19"
58244 3" center in/offset out 18" 23"
54300 2" double offset 14" 19"
58300 2" double offset 18" 23"
54311 2-1/4" double offset 14" 19"
58311 2-1/4" double offset 18" 23"
54322 2-1/2" double offset 14" 19"
58322
2-1/2" double offset 18" 23"
54344 3" double offset 14" 19"
58344 3" double offset 18" 23"
54400
2" single in/dual out
14" 19"
58400
2" single in/dual out 18" 23"
54410 2-1/4" single in/2" dual out 14" 19"
58410 2-1/4" single in/2" dual out 18" 23"
54411
2-1/4" single in/dual out
14" 19"
58411
2-1/4" single in/dual out 18" 23"
54421 2-1/2" single in/2-1/4"dual out 14" 19"
58421 2-1/2" single in/2-1/4"dual out 18"
23"
54422
2-1/2" single in/dual out
14" 19"
58422
2-1/2" single in/dual out 18" 23"
54441 3" single in/2-1/4" dual out 14" 19"
58441 3" single in/2-1/4" dual out 18" 23"
54442 3" single in/2-1/2" dual out 14" 19"
58442 3" single in/2-1/2" dual out 18" 23"
54444
3" single in/dual out
14" 19"
58444
3" single in/dual out 18" 23"
54454
3-1/2" single in/3" dual out 14" 19"
58454
3-1/2" single in/3" dual out 18"
23"
54464
4" single in/3" dual out 14" 19"
58464
4" single in/3" dual out 18" 23"
54500
2" dual in/single out
14" 19"
58500
2" dual in/single out 18" 23"
54501 2" dual in/2-1/4" single out 14" 19"
58501 2" dual in/2-1/4" single out 18" 23"
54502 2" dual in/2-1/2" single out 14" 19"
58502 2" dual in/2-1/2" single out 18" 23"
54504 2" dual in/3" single out 14" 19"
58504 2" dual in/3" single out 18" 23"
54511
2-1/4" dual in/single out
14" 19"
58511
2-1/4" dual in/single out 18" 23"
54512 2-1/4" dual in/2-1/2" single out 14" 19"
58512 2-1/4" dual in/2-1/2" single out 18" 23"
54514
2-1/4" dual in/3" single out 14" 19"
58514
2-1/4" dual in/3" single out 18"
23"
54522
2-1/2" dual in/single out
14" 19"          
58522
2-1/2" dual in/single out 18" 23"
54524 2-1/2" dual in/3" single out 14" 19"
58524 2-1/2" dual in/3" single out 18" 23"
54525 2-1/2" dual in/3-1/2" single out 14" 19"
58525 2-1/2" dual in /3-1/2" single out 18" 23"
54526 2-1/2" dual in/4" single out 14" 19"
58526 2-1/2" dual in/4" single out 18" 23"
54534 2-3/4" dual in/3" single out 14" 19"
58534 2-3/4" dual in/3" single out 18"
23"
54535 2-3/4" dual in/3-1/2" single out 14" 19"
58535 2-3/4" dual in/3-1/2" single out 18" 23"
54536 2-3/4" dual in/4" single out 14" 19"
58536 2-3/4" dual in/4" single out 18" 23"
54544 3" dual in/single out
14" 19"
58544
3" dual in/single out 18" 23"
54545
3" dual in/3-1/2" single out
14" 19"
58545
3" dual in/3-1/2" single out 18" 23"
54546
3" dual in/4" single out
14" 19"
58546
3" dual in/4" single out 18" 23"
54600
2" dual/dual
14"
19"

58600
2" dual/dual 18"
23"
54601
2" dual/2-1/4"dual 14" 19"
58601
2" dual/2-1/4"dual 18" 23"
54602
2" dual/2-1/2"dual 14" 19"
58602
2" dual/2-1/2"dual 18" 23"
54604
2" dual/3"dual 14" 19"
58604
2" dual/3"dual 18" 23"
54611
2-1/4" dual/dual
14" 19"
58611 2-1/4" dual/dual 18" 23"
54612
2-1/4" dual/2-1/2" dual 14" 19"
58612
2-1/4" dual/2-1/2" dual 18" 23"
54614
2-1/4" dual/3" dual 14" 19"
58614
2-1/4" dual/3" dual 18" 23"
54621 2-1/2" dual/2-1/4" dual 14" 19"
58621 2-1/2" dual/2-1/4" dual 18" 23"
54622
2-1/2" dual/dual
14" 19"
58622
2-1/2" dual/dual 18" 23"
54624
2-1/2" dual/3" dual 14" 19"
58624
2-1/2" dual/3" dual 18" 23"
54631
2-3/4" dual/2-1/4" dual 14" 19"
58631
2-3/4" dual/2-1/4" dual 18" 23"
54632
2-3/4" dual/2-1/2" dual 14" 19"
58632
2-3/4" dual/2-1/2" dual 18" 23"
54634
2-3/4" dual/3" dual 14" 19"
58634
2-3/4" dual/3" dual 18" 23"
54641 3" dual/2-1/4" dual 14" 19"
58641 3" dual/2-1/4" dual 18" 23"
54642 3" dual/2-1/2" dual 14" 19"
58642 3" dual/2-1/2" dual 18" 23"
54644 3" dual/dual 14" 19"
58644
3" dual/dual 18" 23"





58742 3" single in/dual 2-1/2" out transverse 18" 23"
Part numbers in black are currently available and in stock.  Call for availability of part numbers in red.




4 x 9 Oval Body Mufflers

Part # Inlet/Outlet Body OAL    
Part # Inlet/Outlet Body OAL
44000
2" center in/out 14" 19"
48000
2" center in/out 18" 23"
44011
2-1/4" center in/out 14" 19"
48011
2-1/4" center in/out 18" 23"
44022
2-1/2" center in/out 14" 19"
48022
2-1/2" center in/out 18" 23"
44044
3" center in/out 14" 19"
48044
3" center in/out 18" 23"
44100 2" offset in/center out
14" 19"
48100 2" offset in/center out 18" 23"
44111 2-1/4" offset in/center out 14" 19"
48111 2-1/4" offset in/center out 18" 23"
44122 2-1/2" offset in/center out 14" 19"
48122 2-1/2" offset in/center out 18" 23"
44144
3" offset in/center out 14" 19"
48144 3" offset in/center out 18" 23"
44200 2" center in/offset out 14" 19"
48200 2" center in/offset out 18" 23"
44211 2-1/4" center in/offset out 14" 19"
48211 2-1/4" center in/offset out 18" 23"
44222 2-1/2" center in/offset out 14" 19"
48222 2-1/2" center in/offset out 18" 23"
44244 3" center in/offset out 14" 19"
48244 3" center in/offset out 18" 23"
44300 2" double offset 14" 19"
48300 2" double offset 18" 23"
44311 2-1/4" double offset 14" 19"
48311 2-1/4" double offset 18" 23"
44322 2-1/2" double offset 14" 19"
48322
2-1/2" double offset 18" 23"
44344 3" double offset 14" 19"
48344 3" double offset 18" 23"
44400 2" single in/dual out 14" 19"
48400 2" single in/dual out 18" 23"
44410
2-1/4" single in/2" dual out 14" 19"
48410
2-1/4" single in/2" dual out 18" 23"
44411 2-1/4" single in/dual out 14" 19"
48411 2-1/4" single in/dual out 18" 23"
44421 2-1/2" single in/2-1/4"dual out 14" 19"
48421 2-1/2" single in/2-1/4"dual out 18" 23"
44422
2-1/2" single in/dual out
14" 19"
48422
2-1/2" single in/dual out 18" 23"
44500 2" dual in/single out 14" 19"
48500 2" dual in/single out 18" 23"
44501 2" dual in/2-1/4" single out 14" 19"
48501 2" dual in/2-1/4" single out 18" 23"
44502 2" dual in/2-1/2" single out 14" 19"
48502 2" dual in/2-1/2" single out 18" 23"
44511
2-1/4" dual in/single out
14" 19"
48511
2-1/4" dual in/single out 18" 23"
44512 2-1/4" dual in/2-1/2" single out 14" 19"
48512 2-1/4" dual in/2-1/2" single out 18" 23"
44522
2-1/2" dual in/single out
14" 19"          
48522
2-1/2" dual in/single out 18" 23"
44600
2" dual/dual
14"
19"

48600
2" dual/dual 18"
23"
44601
2" dual/2-1/4"dual 14" 19"
48601
2" dual/2-1/4"dual 18" 23"
44602
2" dual/2-1/2"dual 14" 19"
48602
2" dual/2-1/2"dual 18" 23"
44611
2-1/4" dual/dual
14" 19"
48611 2-1/4" dual/dual 18" 23"
44612
2-1/4" dual/2-1/2" dual 14" 19"
48612
2-1/4" dual/2-1/2" dual 18" 23"
44621 2-1/2" dual/2-1/4" dual 14" 19"
48621 2-1/2" dual/2-1/4" dual 18" 23"
44622
2-1/2" dual/dual
14" 19"
48622
2-1/2" dual/dual 18" 23"
Part numbers in black are currently available and in stock.  Call for availability of part numbers in red.


409 Stainless Steel Mufflers single wrapped shell

Part # Inlet/Outlet Body OAL
444111
2-1/4" offset in/center out--4" x 9" oval
14" 19"
444122
2-1/2" offset in/center out--4" x 9" oval 14" 19"
444211
2-1/4" center in/offset out--4" x 9" oval 14" 19"
444222
2-1/2" center in/offset out--4" x 9" oval 14" 19"
444311
2-1/4" double offset--4" x 9" oval 14" 19"
444322
2-1/2" double offset--4" x 9" oval 14" 19"
458442
3" single in/dual 2-1/2" out--5" x 11" oval
18"
23"