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Old June 9th, 2004, 10:41 AM
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Darrin Witt
1995 Defender 90
Join Date: Oct 2003
Location: Charleston, SC
Posts: 47
Flowmaster Muffler


I am most likely going to put a flowmaster muffler on mu D-90 Wagon on Thursday. Does anyone have any suggestions? Will I need any extra heat shields? I see that people have used the Flowmaster before. Is it a good muffler-Stock was just to expensive and not stainless. Any comments would help.

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Old June 9th, 2004, 11:14 AM
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Mike Hippert
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94 D-90 Grinding Rover
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,790
Before I merge this scroll down all the way, at the bottom of the screen there is a section called Similar Threads. This was covered a bit I'll merge the two later and if something is missing from whats in the "Stock Muffler ? FlowMaster ? Others ?" thread then post up an dI'm sure someone will answer. KO

Don't forget to Search first then ask questions later! The loose nut behind the wheel
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Old June 9th, 2004, 12:54 PM
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1995 SW #487/500
Join Date: Sep 2003
Location: The Old North State
Posts: 7,405
I say go with a 50 series or 40 series delta flow my .02$
Poor gas mileage gets you to the best places on earth
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Old June 9th, 2004, 01:52 PM
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Nicholas Orros
1995 NAS D90 SW
Join Date: Apr 2004
Location: Tallahassee, FL U.S.A.
Posts: 728
I just couldn't stay away from this one...


Be careful on your muffler choice.
I just put a FlowMaster 50 Series Delta Technology Stainless on my 95 D90 and I absolutely hated it. It has a NICE growl when it's sitting still idling, but say going up a hill in 3rd gear in traffic with your foot just slightly on the gas is insane. And downshifting brings up another problem I had with it... it sputters, spits, and basically backfires. You might ask.... 'well Nick, maybe your engine isn't running that well ?...'

Nope. I run AMSOIL Synthetics throughout this beast and am religious with maintenance and now that I've put on the Stock muffler it's quiet again. I spoke to a couple of muffler shops BEFORE I put the FlowMaster 50 on and they said you won't get any horsepower increase, or a very small one at that.
I didn't want to go with a FlowMaster because of the sound and the guy at this particular muffler shop I went to said that with the 50 series, there are 3 'chevrons' which lessen the sound a bit but it was still too much for me.

On top of that the guy banged me $150 for the FlowMaster and you could buy it for $80 online. I was in a pinch and needed to rent a car that day to drive up to NJ from Florida so I said what the hell.

In any case, I drove it for that day, then called a Rover vendor and purchased one for $250. WELL WORTH THE MONEY, I can't tell you... even though I lost a good amount of my initial $150 FlowMaster price.

Some of the guys on here love the FlowMaster, but I hate it. The truck is loud enough without having to deal with that 'tin can' sound ...
If you do end up going with the FlowMaster you won't need a heat shield ... Just Ear Plugs!

Just my .01 Cent

Nicholas Orros
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Old June 9th, 2004, 02:26 PM
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Doug Walker
TVR5L-powered NAS D-110
Join Date: Oct 2003
Location: Los Angeles, CA, USA
Posts: 880
My Flowmaster was too loud as well, especially at about 2700 RPM just cruising. The truck is loud enuf already! So I added back on a high flow resonator in the tailpipe, and that handled the noise.
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Old June 9th, 2004, 02:39 PM
Eric Siepmann
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Eric W. Siepmann
1997 Defender 90 SW
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
Th NRP is also an option. There is a noticeable increase in your exhaust, but it is nearly imperceptable inside my SW and overall it is no where near the Flow master. Just makes the rover sound like a v-8 is under the hood and not a sewing machine. The stainless is nice as well. Borla also makes a nice stainless for the 90, but I hear that is loud nearly as loud as the flow master.

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Old June 9th, 2004, 03:48 PM

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I have a 40 series "delta flow". It is tuned down a little from the basic 40 series. Love it! sounds a little like the 5.0 L mustanges. I love hearing folks in other parts of the country disatisfied with the cost/install. You guys should see what a muffler shop in the Vail Valley gets. Mr Ben dover your car is ready.
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