Would 1 (dual in/dual out) perform the same as 2 (single in/single out) mufflers?
I would run each from the dual cats straight into the two systems (no Y-pipe). Will I get enough back pressure? Would the first system just be cheaper and not perform as well? I would like to run each of the tail pipes out in front of the rear tire with bassani tips. Which is better?

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99 F-150 XLT SuperCab Flareside, 4.6, 4x4 orp.

 

briguy, I really don't understand what your asking. Most systems run 1 pipe to a muffler and exit with 2 tail pipes or break the orginial cross over and run dual pipes to each muffler (2) and then 2 tail pipes.

Both systems work fine, have had both, the single pipe with the dual out muffler is the cheapest, due to only buying 1 muffler.

As for you running your exhaust pipes out in front of your rear tires, your going to have a problem on the drivers side, the gas tank is in your way. Most people run both exhaust tips out the passenger side, just like the Lightning.

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DOGCAM
dogcam@f150guy.com
01 F-150 SC Lariat
Flareside 4X2,5.4,3:73
LS, SnugLid,Dynomax
Exhaust,Kenwood Amps,
Speakers,JL 10" Sub

 

You will have enough backpressure with either setup if the system is properly sized. Setup 2 is generally quieter using similar muffler designs. The only cost reduction is the extra muffler savings. Performance-wise it would depend on the muffler design and flow rate; it would be similar on a straight through design for instance. On a lower flow rate muffler you could achieve better performance with 2 mufflers.

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2000 F-150 XL, RC, LB, 5.4L, 4R70W, 4.10LS,
Class III tow, Payload #3, & Convenience pkgs.,
4-wheel disc/ABS, Chestnut/Parchment 40/60,
Ford bedliner w/Paintsaver & gas/wheel/spare locks,
K&N F.I.P.K. w/Outwears pre-filter, Superchip,
Dynomax ultra-flow welded 3" cat-back w/ 3" Y-pipe,
Hellwig front & rear anti-sway bars, Rancho RS 9000s,
Pirelli Scorpion Zero 275/60/16s, Mobil 1, K&N oil filter.

 

I usually buy a 40 series Flowmaster with one 3" inlet and dual 2 1/2" outlets. It has a nice sound and is cheaper than true duals. Also on my trucks, I've added K&N air intake systems. They suck air like a four barrel.

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99 F150 Ext. cab 2wd
4.6L K&N Filter Kit
Dual exhaust w/Flowmasters
2"/4" Lowering
Truck Master valance
16x8 Polished Ultra's

99 Expedition 4.6L 2wd

64 Galaxie 500
390 cid auto.
under reconstruction

2001 Sport Trac
Rolled over and under construction!

 

I'm worried that a 40 series would be too loud, I don't want to wake anybody when I come home from my 2nd shift job.

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99 F-150 XLT SuperCab Flareside, 4.6, 4x4 orp.

 

Briguy,

Not trying to confuse you more but have you heard of CGS mufflers? I put a SI/DO on my 93-F150 with 302 about 3 months ago and I love it. It won't wake the neighbors and sounds good when you get on it although it is still not very annoying. I got it because it seemed everyone around here had flow's. Their website is www.cgsmotorsports.com and they will answer emails or you can talk to them in the phone. They also have a DI/DO muffler as well.

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93 F-150
302, auto
CGS Motorsports Muffler
Tinted Windows

92 Ranger
2.3 4cyl.
256,000 mile daily driver
Don't laugh it still gets 25mpg.

 

briguy:
Don't worry about waking up the neighbours with the FM40's, I've got two of'em on mine and the only time it would be too loud would be if I floored it coming down the street or in the driveway. Really, they're loud, but only when you want them to be. I hope this helps you out.

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Black 98 F150-XL, 2WD, 4.6L Slappin Windsor Triton, 5spd.,
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Triton V8 Badges, Duraliner Bedliner, K&N, Ziebart, Castrol Syntec
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