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Unread 10-26-2007, 03:33 PM   #1
Kalesinajeep
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1995 YJ Wrangler 
 
Join Date: Oct 2007
Location: Washington
Posts: 175
Flowmaster on a 2.5l

hi
i just swaped a 99 2.5l in to my 95 yj wrangler so i guess my jeep is now a y/tj anyway
the people who i bought it from had cut of the exahust.
so i have a slight problem.
my dad remembered that he had a 2" flowmaster from way back when he raced mini stocks(volkswagon rabbits)
emmisions are not a concern
and
will going straight from the down pipe to this flowmaster
work,
ive heard that a catalytic converter in a 2.5l actually is better on then off for power

please only comments from people who know 2.5l motors cause its not the same as a v8 or 4.0l

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Unread 10-26-2007, 03:40 PM   #2
MTpockets
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1997 TJ Wrangler 
 
Join Date: Jul 2006
Location: virginia beach, va
Posts: 171
i have heard the same thing so i just replaced my cat.
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Unread 10-26-2007, 05:00 PM   #3
JohnRodriguez
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1989 YJ Wrangler 
 
Join Date: Sep 2004
Location: Silver City, New Mexico
Posts: 429
I had removed the guts from my cat a few years ago and the engine would get a hellatous backfire every now and then. I had installed a new flowmaster catback and replaced the cat with a flowmaster hushmaster II and it made the engine real quiet. The fumes were not very fun so replaced it with a new cat. Little more noisy. You may not like a flowmaster alone, mine was a little to loud when i tried it. My alltimate go was to get it as quite as possible for hunting coyotes, and would install the hushmaster if I had the room. maybe by the gas tank, have to mesure later tonight.
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Unread 10-27-2007, 03:09 AM   #4
Jesse-James
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1989 XJ Cherokee 
 
Join Date: Dec 2006
Location: SE WI
Posts: 1,129
It acts much better with a high flow cat than without one.
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Unread 10-31-2007, 02:24 PM   #5
Kalesinajeep
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1995 YJ Wrangler 
 
Join Date: Oct 2007
Location: Washington
Posts: 175
Quote:
Originally Posted by Jesse-James
It acts much better with a high flow cat than without one.
what would be a good hi flow cat?
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1995 YJ Wrangler,1999 TJ 2.5L Motor
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Unread 10-31-2007, 06:14 PM   #6
Jesse-James
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1989 XJ Cherokee 
 
Join Date: Dec 2006
Location: SE WI
Posts: 1,129
Magnaflow HiFlow Stainless
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Unread 11-05-2007, 10:16 AM   #7
TJRanger
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2007 JK Wrangler 
 
Join Date: Mar 2005
Location: Woodbridge, VA
Posts: 135
any one get better MPG with a high flow cat? What is it?
I am trying to get all the HP and MPG increase i can out of 2.5l TJ. replaced the old cracked manifold with a PaceSetter header. Now looking to replace cat and muffler. Hoping I will get some gain with a cat back system but would a high flow cat be worth the effort?
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Unread 11-07-2007, 03:21 PM   #8
badass87yj
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1987 YJ Wrangler 
 
Join Date: Nov 2007
Location: Scottsville
Posts: 88
highflow cat= stock with nothing left in it
my buddy has flomaster system from muffler back with single pipe, and it sounds good. Not annoying like my other friend who had a 6cyl with doul pipes.
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