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The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
40 Series – 2.25 Offset In / 2.25 Center Out – Aggressive Sound
2.25IN (O)/OUT (C) 40 SERIES
MUFF 2.25IN
Universal Muffler – Some adaptation may be required.
| Brand |
Flowmaster |
|---|---|
| Part Number (MPN) |
42441 |
| SKU |
42441 |
| UPC / GTIN |
700042010295 / 00700042010295 |
| Condition |
New |
| Disclaimer |
No |
| Body Height |
4.00 |
| Body Length |
13.00 |
| Body Material |
Aluminized Steel |
| Body Width |
9.50 |
| Category |
Exhaust |
| Clamps Included |
No |
| Emission Code |
5 |
| Exhaust Tip Quantity |
0 |
| Finish |
High-Temperature Paint |
| Fitment |
Universal |
| Grade Type |
Performance |
| Hanger Included |
No |
| Heat Shield Attached |
No |
| Inlet Connection |
Slip-Fit |
| Inlet Diameter |
2.25 |
| Inlet Inside Diameter |
2.25 |
| Inlet Location |
Offset |
| Inlet Outside Diameter |
2.38 |
| Inlet Quantity |
1 |
| Inlet Type |
Weld-On |
| Muffler Series |
Original 40 Series |
| Muffler Type |
Chambered |
| Outlet Connection |
Slip-Fit |
| Outlet Inside Diameter |
2.25 |
| Outlet Location |
Center |
| Outlet Outside Diameter |
2.38 |
| Outlet Quantity |
1 |
| Outlet Type |
Single |
| Overall Length |
19.40 |
| part type |
Exhaust Muffler |
| Product Type |
Street Mufflers |
| Reversible |
No |
| Shape |
Oval |
| Sound Level |
Aggressive |
| Sub Category |
Mufflers |
| Tunable |
No |
| Vehicle Type |
Classic Muscle Car |
| Year |
1987 |
| Make |
Buick |
| Model |
Regal |
| Body & Trim |
Base |
| Engine & Transmission |
5.0L V8 – Gas |
Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|---|---|---|---|
| 1978 | Buick | Regal | Base | 5.0L V8 – Gas |
| 1978 | Buick | Regal | Limited | 5.0L V8 – Gas |
| 1979 | Buick | Regal | Base | 5.0L V8 – Gas |
| 1979 | Buick | Regal | Limited | 5.0L V8 – Gas |
| 1980 | Buick | Regal | Base | 5.0L V8 – Gas |
| 1980 | Buick | Regal | Limited | 5.0L V8 – Gas |
| 1986 | Buick | Regal | Base | 5.0L V8 – Gas |
| 1986 | Buick | Regal | Limited | 5.0L V8 – Gas |
| 1987 | Buick | Regal | Base | 5.0L V8 – Gas |
| 1987 | Buick | Regal | Limited | 5.0L V8 – Gas |
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