Core XK's Garage

[Core XK]

Well 2.5 is the oem exhaust diameter. If you got a 3 inch it wouldnt just weld right in. You would have to do 3 inch exhaust off the rear of the muffler and have some sort or piece prior to the muffler changing it from 2.5 to 3 inch. They make 3 inch cat back exhaust that bolts right to the oem flange if your looking for 3 inch. But like I said if you just want to cut out the oem muffler and weld in a flowmaster you want 2.5 inch

Thanks man, and your talking about for the 5.7L Hemi right?

[Matt]

For some reason I thought the 5.7L is 3", not 2.5". Will have to double check.....

[Core XK]

For some reason I thought the 5.7L is 3", not 2.5". Will have to double check.....

Well It will only be $21.63 for the flowmaster and CB radio so I will wait to order until I or we find out exactly which Flowmaster to order lol

[07JeepXK]

Thanks man, and your talking about for the 5.7L Hemi right?

For some reason I thought the 5.7L is 3", not 2.5". Will have to double check.....

5.7/4.7 doesnt make a difference. They are both 2.5 inch

[Core XK]

5.7/4.7 doesnt make a difference. They are both 2.5 inch

Okay thank you! it just seemed small for the Hemi that's the only reason I was questioning the 2.5

I assume a shop would only charge maybe $50-60 for install? I am only paying $20 bucks for it anyway

[07JeepXK]

My friend just bought a 2006 Hemi XK and installed MBRP 3 inch Cat back exhaust. His oem exhaust was 2.5 inch, the same as my 4.7 Liter. The reason it looks like slightly larger than 2.5 inch is because your measuring the O.D. of the exhaust but it goes by inner diameter where the exhaust flows.

Unless they changed the diameter for the newer XK's. Wouldn't make sense to me.



http://www.jeepcommander.com/forums/...ead.php?t=1667

[Core XK]

Thanks for all of the info man. I ordered the 2.5 I/O today. I can't wait to have it installed!

[Matt]

Awesome, can't wait to hear it cause i've been debating what muffler to have ready for my "backup" after i tear open the stock one on a rock!

[Matt]

I based it off the Flowmaster application guide:
2005 WK 5.7L 50-series PN 9530560
3" offset in / 3" center out

..... figured they didn't change the exhaust system in following years.

Also all ram truck 5.7L applications in our model years have 3" I/O specs.

Guess there's nothing left to do but get out the tape measure! Lol

[Core XK]

I based it off the Flowmaster application guide:
2005 WK 5.7L 50-series PN 9530560
3" offset in / 3" center out

..... figured they didn't change the exhaust system in following years.

Also all ram truck 5.7L applications in our model years have 3" I/O specs.

Guess there's nothing left to do but get out the tape measure! Lol

I am pretty sure your right because I measured it before and I don't think it was 2.5. However, Ahmed on JC.com had the 2.5" installed lol