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Unread 07-25-2003, 11:29 AM   #1
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exhaust on 4.7 HO should i get borla?

ok, i have the 4.7 HO, whats a great exhaust and performs well and sounds good too. should i get a borla cat back system? I was looking for a performance cat converter too but i read that it is illeagle to swap a cat converter on any car with less than 50,000 miles, is this true?

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Unread 06-19-2012, 07:11 PM   #2
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As long as the new cat can pass emissions, its perfectly legal to swap. Imagine if your cat breaks before 50,000 miles, its not like you have to drive the car without a cat until you break 50,000 and can replace it.
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Unread 06-19-2012, 08:19 PM   #3
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Have you heard of my Kolak Exhaust? It's a 3" diameter system with high flow converter. If you search here, on Youtube, or just Google it you'll get countless hits.

PM me your email address and I'll send you all the information - you get 10% off my regular pricing as a forum member.
Kolak Performance and Offroad
Member: Specialty Equipment Market Association
Telephone: 480 998-3661
kolak@aol.com or kolak@kolakperformance.com
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Unread 06-19-2012, 09:14 PM   #4
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Borla is roughly $400-500 for their system, and I doubt you will see much, if any, performance gains. I have a Powerstick muffler, $70 and it sounds great. Borla does have a nice tone, but the price for the stainless system is way too much imo
2004 WJ Overland 4.7HO Graphite 127k miles / Powerstick Muffler / Superchips / Bilstein HD's / Addco Rear Bar / SOLD!
1998 ZJ Limited 5.9 SOLD!
2010 WK Laredo 5.7

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Unread 06-19-2012, 09:33 PM   #5
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I ran borla on my old is300 and loved it. I have a borla muffler on my i6 4.0 now. It has the greatest tone of any muffler I've heard on 6 bangers. It sounds bad*** on mustangs also. Never heard it on a v8 jeep though.

Just my 0.02
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