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Home > Dr. Gas X-Scream Mufflers

Dr. Gas RevPro 4-Trap Muffler

Part Number SPM4
Dr. Gas RevPro 4-Trap Muffler
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Case Thickness
Thin Case (3.25")
Thick Case (4.25") [+$15.00]
Inlet/Outlet Size
2.5" Inlet / 2.5" Outlet
3" Inlet / 3" Outlet
3" Inlet / 2.5" Outlet
3.5" Inlet / 3.5" Outlet (Thick Case Only)
3.5" Inlet / 3" Outlet (Thick Case Only)
4" Inlet / 4" Outlet (Thick Case Only) [+$25.00]
Paint Color
Black [+$20.00]
Copper [+$30.00]
no paint
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Sold out of the thin case 4 trap mufflers, 2 weeks before there available. 

The muffler you've been waiting for! A 100%-flow performance muffler that won't make your ears bleed. The Dr. Gas RevPro Muffler comes in small case (4-cylinder/6-cylinder) and large case (6-cylinder/8-cylinder).

Our Dr. Gas RevPro mufflers use our patented spin-trap design to give you an extremely smooth, deep-toned exhaust note with no rasp and excellent performance.  Our Dr. Gas RevPro mufflers flow equal to a piece of straight pipe!  It's true.

Plus, our mufflers are tough!  They're constructed from thick-gauge aluminized mild steel, then painted with high-temperature muffler paint.  Would you dare drive your truck over one of our competitor's mufflers?

Thin Case Dimensions:    14 1/2" x 6 1/2" x 3 1/4".
Thick Case Dimensions:  14 1/2" x 6 1/2" x 4 1/4".

Note: At this time, these mufflers are only available in offset-in / offset-out configuration.


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