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Flowmaster
Flowmaster 2.25 IN(O)/OUT(C) 50 Series DF SS Muffler - 842451
Flowmaster 2.25 IN(O)/OUT(C) 50 Series DF SS Muffler - 842451
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Flowmaster
SKU:
FLO842451
|
- UPC:
- 700042018284
$188.95
$212.95
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$24.00
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Other Flowmaster kits for this car
Fits these vehicles
- 1985-1987 Buick RegalBase
- 1978-1983 Buick RegalBase
- 1986-1987 Buick RegalLimited
- 1978-1983 Buick RegalLimited
- 1974-1977 Chevrolet CapriceClassic
- 1974 Chevrolet CapriceEstate
- 1974-1977 Chevrolet ImpalaBase
- 1991 Chevrolet S10Baja
- 1994-1997 Chevrolet S10Base
- 1983-1992 Chevrolet S10Base
- 1988-1990 Chevrolet S10Durango
- 1983-1986 Chevrolet S10Durango
- 1992-1993 Chevrolet S10EL
- 1994-1997 Chevrolet S10LS, SS
- 1983-1989 Chevrolet S10Sport
- 1983-1992 Chevrolet S10Tahoe
- 1994-1997 Chevrolet S10ZR2
- 1983-1994 Chevrolet S10 BlazerBase
- 1987-1989 Chevrolet S10 BlazerHigh Country
- 1994 Chevrolet S10 BlazerLT
- 1992 Chevrolet S10 BlazerSport
- 1983-1990 Chevrolet S10 BlazerSport
- 1990-1994 Chevrolet S10 BlazerTahoe
- 1983-1988 Chevrolet S10 BlazerTahoe
- 1991-1994 Chevrolet S10 BlazerTahoe LT
- 2006-2008 Chrysler PT CruiserBase
- 2001-2004 Chrysler PT CruiserBase
- 2010 Chrysler PT CruiserClassic, Couture Edition
- 2002 Chrysler PT CruiserDream
- 2005 Chrysler PT CruiserDream Cruiser
- 2003-2007 Chrysler PT CruiserGT
- 2008-2009 Chrysler PT CruiserLX
- 2001-2009 Chrysler PT CruiserLimited
- 2005-2006 Chrysler PT CruiserStreet Cruiser
- 2001-2009 Chrysler PT CruiserTouring
- 1969-1974 Dodge DartBase, Custom
- 1971-1972 Dodge DartDemon
- 1969 Dodge DartGT, GTS
- 1971-1974 Dodge DartSpecial
Part details
- Part number
- FLO842451
- Manufacturer part number
- 842451
- UPC
- 700042018284
- Brand
- Flowmaster
- Part type
- Muffler
- Prop 65
- ⚠️ WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
- Special order
- Yes — ordered in for you; allow extra time
- Instructions
- Installation instructions (PDF)
- Material
- Stainless steel
Installation guide (from Flowmaster)
Hosted by Flowmaster. Follow the maker's instructions and torque specs.
- Box size:
- 10.00 × 4.50 × 24.80 (in)
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Read before you buy
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The three chamber design utilizes Flowmaster's Delta Flow® technology along with an internal tuning chamber to reduce sound inside the vehicle. Provides the same performance and exterior tone characteristics as the two chamber, but with less interior resonance. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
50 Delta Flow® Stainless Steel - 2.25 Offset In / 2.25 Center Out - Moderate Sound
Flowmaster 50 Series Delta Flow Chambered Muffler
- Improved Horsepower, Torque and Engine Efficiency
- Excellent choice for Street Rod cars and trucks
- Mild interior resonance
- Moderate Sound
- Clearance Item:
- N
- LTL:
- N
- MPN:
- 842451
- Proposition 65:
- Y
- Special Order:
- Y
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Flowmaster
Flowmaster 2.25 IN(O)/OUT(C) 50 Series DF SS Muffler - 842451
Flowmaster 2.25 IN(O)/OUT(C) 50 Series DF SS Muffler - 842451 FAQ
It is listed for: 1985-1987 Buick Regal; 1978-1983 Buick Regal; 1986-1987 Buick Regal and more (see the full list above). Pick your vehicle on this page to check your exact year and trim.
The maker's installation guide is on this page — see Installation guide under the part details for the step-by-step and the torque figures. Work on level ground with the car properly supported, and torque every fastener to the maker's figure. If the job is beyond your tools, any shop that does this kind of work can fit it.
The sound depends on the muffler and resonator design. A cat-back with a resonator stays closer to stock; an axle-back changes the tone more than the volume. Look for the maker's sound notes or a clip on this page.
Cat-back and axle-back systems bolt to the factory connection points. Headers and downpipes replace the factory pipe at the engine and may need new gaskets and hardware; see What's in the box.
A cat-back or axle-back needs no tune. Headers and downpipes change what the oxygen sensors see, so many cars need a tune or a sensor spacer to avoid a warning light.
Drone depends on the muffler and resonator design and your car's gearing. Systems with a resonator or an X-pipe drone less, and the maker notes when a system is built to be quiet at cruise.
An axle-back or cat-back is a jack-stands job with the right sockets and penetrating oil for rusty bolts. Headers and downpipes take more room and time, and a lift helps.
Most systems include the clamps and gaskets they need; see What's in the box. Reuse a factory gasket only if it is undamaged.
Yes — monthly options show right under the Add to Cart button. Affirm, Klarna, PayPal Pay Later and Snap Finance are offered at checkout, and checking what you qualify for does not affect your credit score.
Install and care: mufflers
Before you start
- Soak the factory flange bolts and hangers in penetrating oil the day before.
- Lay out the sections and clamps against What's in the box before anything goes under the car.
Do
- Hang the whole system loosely first, line it up, then tighten the clamps from the front back.
- Check for leaks at every joint with the engine running before the final tightening.
Don't
- Don't tighten any clamp fully until the whole system hangs straight.
- Don't reuse a crushed or torn factory gasket.