Flowmaster 50 Series SUV muffler is the way to go on a 4.7 liter. Hands down....
Flowmaster 50 Series SUV muffler is the way to go on a 4.7 liter. Hands down....
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
I watched several Youtubes, of the 40, 44, and 50, and while the 50 was nice, I think for sound + performance, the 44 still tops it. Or I could be wrong.Originally Posted by 07JeepXK
Why the 50 over the 44, in your estimation?
'07 Jeep Commander, Rocky Mountain Edition - 287 V-8 - Superchipped - aFe Stage II R-5A CAI - Flowmaster Super 44 - 2" Daystar lift - Spidertrax spacers - 32x10.5x17 Cooper A/T's - Fastman throttlebody - Skyjacker 8000 shocks
My Flowsound (Flowmaster knock off) Muffler on my 4.7.
Interior Sound at Idle: Low, rumble
Exterior Sound at Idle: Low Rumble
Interior Sound at Freeway Speeds: 45 ish is a bit loud. Real deep. After overdrive kicks in its manageable. Havent had it up past 70, but im thinking about 75 she will get loud.
Exterior Sound at Freeway speeds: Not sure
Any performance gain advertised vs felt: Not really
Size of muffler vs the Stock setup: just a replacement, I think its a little more tucked under there than the big old stock one.
Overall impression: loud and I love it!! best 80 bucks I spent.
Last edited by BonesWK; 04-02-2012 at 08:27 AM.
Ryan ---- 2006 WK 4.7 QDII <- Click for Garage
2.25" RR Lift - Front Bilstiens - Rear OMEs - 32" Wildpeaks - Saguaro 4x Shackles - Tail Light Guards - AFE intake - Rola - Exhaust
Twitter Facebook ---- Chive On
I have the 40. It's only loud around 2,000-2500 rpms from 1st-3rd gear. But my buddies like it. I like it. It's awesome.
I guess its just a personal preference. But I think the 50 series SUV muffler is great on the 4.7 liter. It has a mean sound to it and its not raspy at all. You dont get that loud interior drone like you do with the 40 or 44 series and can actuall carry on a conversation while driving..lol Not to mention how many people that have come up to me saying how great it sounds.I watched several Youtubes, of the 40, 44, and 50, and while the 50 was nice, I think for sound + performance, the 44 still tops it. Or I could be wrong.
Why the 50 over the 44, in your estimation?
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
I'm torn between the cheap Thrush muffler or the Flowmaster Series 50. Anyone know which model I need for my 3.7 WK? What diameter inlets and where they are located?
2.5 inch....offset inlet, center outlet. I'm not sure how the 50 series will sound on your 3.7 liter. Sounds amazing on my 4.7...
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
I'm starting to think that the investment into a Flowmaster or Dynamax probably isn't worth it on the weak little 3.7. Might just go with the Thrush. I've regretted buying the 3.7 ever since day one.
Why do u regret buying it. What are you trying to do? There is more then u think out for the 3.7 liter now. You can get shorty headers....cold air intake...performance tune...3.73 gears.....4 low....just saying
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
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