I have the gibson 9504, split rear system.
And in my opinion, it is WAY too quiet.
You cannot notice any change what so ever.
Plus I have 24 inch chrome slash tips tacked to the pipes out the back, just hoping to amplify what ISN'T THERE.

I can hear a hum in the truck, but not outback. if I were you, I'd look at some other options. My system is 30 days old.

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2001 Lariat SCrew / Oxford White / Sunset Orange Pearl (House of Kolor)
Truck Master Designs FD630-S AirDam, Gibson 9504/Split Rear Exhaust, Fac Moon Roof, 3:55LS, 6CD, Gen III/Beige Buckets, Cab Steps, Slider, Tow, Bed Extender, Bell Tech 2" Shackles, Snug Lid

Check out my Photo's at
http://photos.yahoo.com/bc/xtruky

 

I am thinking of installing Gibson split rear on my 99 SC SB F150 4.6. Does anyone have any input on the sound of the exhaust inside and outside the cab.
All input is appreciated.
Thanks

 

Hey Tweeter, I enjoy my Gibson very much, both with the inside and outside tone. There is a slight drone in the cab at low RPM's, but nothing anyoying. The sound outside is cool!! When the fire the truck your hear the vrrrrrooooooom and only gets better when you are driving! That is why I bought the exhaust was to hear it and feel it. As far as performance, well due to the length of the pipes you loose some low end, and the noticeable gains all seem to be in the higher range. I had my system installed and welded rather then using those ugly clamps they provide. It looks and sounds great, that install was a well spent 100$. I also suggest the chrome 12' slash tips, they look great. I bought mine in stainless from truckperformance.com for 400$ and shipping was free (still is till March 30th). That site also has all the goodies such as tips to go with the exhaust. I believe Roger here in the online store can also get that same exhaust, you may want to check with him to see if he can compete. Good luck with it!

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My Truck:
2000 Flareside EC/SB 4.6 4X2-Harvest Gold
Sliding rear window
Class III Towing Package
Ford Bedliner
Modifacations
Airaid FIPK/w K&N filter
Gibson Exhaust-duals/w tips
Superchip
Factory bedliner
Westin nerf bars-PowderBlk
Lund vent shades, bug shield
V-Tech tail light covers (painted to match)
Mirror Covers (painted to match)
Factory street flares (painted to match)
Factory grill w/honeycomb insert
Clear Corners
Tinted Windows

Future Mods/Wish List
Some kind of aftermarket rims
Leer Snug lid
See my Truck: http://www.f150world.com/trippn/

[This message has been edited by Trippn (edited 03-21-2001).]

 

Tweeter,
I've had a Gibson Split Rear for about two months now. Like Xtrucky I had 20" long 4" diameter slash tips put on to amplify the sound a little.

All I can tell you is, it completely depends on what you want. Compared to a FM 40 series, yes the Gibson is very quiet. This is not to say there is no change over stock at all. It is probably 2, to 2.5 times as loud as stock (bare in mind, stock is almost silent). And the sound it adds is a very nice, clean sounding rumble.

If you're looking for something that is going to turn heads every time you accelerate from a stop, don't get a Gibson. But if you're looking for something that's going to add a nice professional tone, and something that fellow car/truck nuts will take notice of, get a Gibson.

One thing to consider: what type of driving do you do? I do a lot of city (Boston) driving, and the Gibson sounds very nice echoing off of buildings when going down the small streets. A FM40 would have been obnoxiously loud for my purposes. But if you do a lot of suburban or fairly rural driving then a FM40 might be right for you.

ps: As with all catback's, I did notice a slight performance increase with the Gibson. But let's be honest, not many people buy catback's for the performance aspect. $300-$500 is a lot of money for 5-15 extra HP.

Hope this helps

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Base:
Black 2001 F-150 SC
4x4, 4.6
Sport Package

Extras:
Gibson Split Rear exhaust
K&N Airfilter
Rhino lining
Valentine 1 Radar

Future additions:
Gibson headers
FIPK
Superchip

 

xtruky; I must say thats one hell of a paint job.I like it.Dont park it the western part of Pa. It may drive off with you. Just kidding great looking truck.....OLDGRAY

 

Tweeter,

I put the Gibson stainless split rear on my truck about a year ago. There is a little rumble to it. Darn little. Not loud enough for my taste so a few weeks ago I had a Ravin Z55 muffler put on leaving the pipes from the Gibson system. I love the way it sounds now. If anybody wants their V8 to sound like one, I recommend the Ravin.

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2000 Regular Cab Short Box XLT 2WD 5.4 silver 3.55 LS 4 wheel antilock discs
PERFORMANCE MODS
Superchip Flip Chip, K&N Air Filter, Gibson Stainless Split Rear Cat Back with Ravin Muffler, Edelbrock IAS Shocks, Hellwig Front Sway Bar
APPEARANCE MODS
17x8 TSW Trackers, 285/60-17 Pirelli Scorpion Zeroes, ARE LSII Fiberglass Tonneau, 2 inch drop shackles, Ford factory fog light kit, Custom Made 5.4 Fender Badges, Grill off of my brother's Lightning
STEREO MODS
Pioneer DEH-P7200 CD Receiver, MTX Road Thunder RT4340 4 Channel Amplifier, Infinity Kappa 572.1cf 5x7's in the doors,MTX Thunderform with two 10" MTX Thunder 6000 Subs
PROTECTION
Valentine 1 Radar Locator with Remote Display

 

I think if you want loud and Gibson, Super Truck is about it. Although, keep in mind Gibson started out making exhaust for RV's. they now make great exhaust for trucks that functionaly improves performance. They don't make "hot rod" exhaust systems.

I've got the Swept Side and it's gotten louder with age (about 2 months since the install) but for an EB Expy, it sounds perfect!!

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2000 EDDIE BAUER EXPEDITION 4x2

• Estate Green
• 5.4 ltr
• 3:55 LS rear
• Superchip!
• Airaid FIPK
• Gibson S/S Swept Side Cat Back Exhaust
• Hellwig Rear Anti-Sway Bar
• Xenon Super White Head and Driving Lights
• Clear Corners
• Tow Package
• Rear Load Leveling
• Moonroof
• Century Child Seat!
• Front Polyurethane Anti-Sway Bar Bushings recieved, wrong part number
• Edelbrock IAS Shocks Ordered

-->Come share my Addiction<--