Flowmaster 40 Series Mufflers
The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle – the 40 Series is for you.
- The original high performance Flowmaster muffler
- Aggressive sound for the enthusiast you likes their exhaust LOUD
- Available in either aluminized steel or 409S Stainless
- Stainless steel mufflers covered by limited lifetime warranty
- Fully MIG welded for durability
FLOWMASTER 40 Series Muffler 42441
$108.75
$127.94
SKU FLO42441
- 4"H x 9.75W x 13" L
- Inlet position Offset
- Outlet position Center
FLOWMASTER 40 Series Muffler 42443
$108.75
$127.94
SKU FLO42443
- 4"H x 9.75W x 13" L
- Inlet position Offset
- Outlet position Offset
FLOWMASTER 40 Series Muffler 42541
$108.75
$133.76
SKU FLO42541
- 4"H x 9.75W x 13" L
- Inlet position Offset
- Outlet position Center
FLOWMASTER 40 Series Muffler 42543
$108.75
$133.76
SKU FLO42543
- Body height 4"
- Body width 9.75"
- Outlet position Offset
Flowmaster 40 Series Muffler 430402
$108.75
$133.76
SKU FLO430402
- Body height 4"
- Body width 9.75"
- Outlet position Dual
FLOWMASTER 40 Series Muffler 43041
$110.00
$133.76
SKU FLO43041
- Body height 4"
- Body width 9"
- Outlet position Center
FLOWMASTER 40 Series Muffler 43043
$110.00
$133.76
SKU FLO43043
- Body height 4"
- Body width 9.75"
- Outlet position Offset
