Specification Sheet

ManualsBrandsFlowmaster ManualsAutomotiveFlowmaster 42541 40 Series Muffler - 2.50 Offset IN / 2.50 Center OUT - Aggressive Sound

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PowerfulPowerful

Powerful

DeepDeep

Deep

MellowMellow

Mellow

Interior

Tone

Level

Muffler

Case

Dimensions

 SERIES™ SERIES™

 SERIES™

MildMild

Mild

OEOE

4.0” Thick

9.75” Wide

13.0” Case Length

19.0” Overall

Exterior

Tone

Level





SeriesSeries

Series





SeriesSeries

Series

SERIES™





Performance Street & StripPerformance Street & Strip

Performance Street & Strip

Application RecommendationsApplication Recommendations

Application Recommendations

 Series Series

 Series

” Thick  ” Wide ” Overall Length  ” Case Length” Thick  ” Wide ” Overall Length  ” Case Length

” Thick  ” Wide ” Overall Length  ” Case Length

IN/OUT PART IN/OUT PART IN/OUT PART IN/OUT PART

2.00” 42040 2.00” 42041 2.00” 42042 2.00” 42043

2.25” 42440 2.25” 42441 2.25” 42442 2.25” 42443

2.50” 42540 2.50” 42541 2.50” 42542 2.50” 42543

3.00” 43040 3.00” 43041 3.00” 43042 3.00” 43043

IN/OUT PART IN/OUT PART IN/OUT PART

The  Series is the most aggressive sound

ing street and strip muffler in Flowmaster’s

product line If you are looking for the

original “Flowmaster tone” the  Series

is the one The performance street and strip

muffler will also generate interior resonance

within the vehicle So if you want to really

hear your exhaust system inside the vehicle

as well as outside it the  Series is for you

3.00” 43044 single 2.25”/ Dual 2.25” 424422 single 2.50”/ Dual 2.25” 425432

single 3.00”/ Dual 2.50” 430402

single 3.00”/ Dual 2.25” 430422

•Off Road and Race applications

•Early and Late model street/strip vehicles

with or without catalytic converters

•Original Flowmaster Tone

•Vehicles with dual exhaust tone

•Vehicles with dual exhaust *

* HPipe is strongly recommended in all dual exhaust applications

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The Original Flows

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