I have a 99 Lariat 4.6l on Aruba and we do not have to have a catalist. Is it possible to remove or bypass the catalist. Can I just block the airhose that comes from the catalist? Will this give me any problems?
I know that it will give me a couple of HP extra.

 

you can do away with it, but you will cause a "check engine" light, as cat efficiency is monitored by the PCM. Also you will not see a significant HP gain and will tend to lose low end torque in the process. GO by a K+N/chip/catback exhaust. They will all cheaply make you some more ponies.

 

Nomopar4me, I like to thank you for your quick responce. Thanks a mil. Will do the K+N/chip/catback exhaust ASAP.

 

Have you read about or seen the Dynomax Super converters? Dynomax claims a 26% increase in flow capability or approximately 1/3 better flow than OE converters.

Many years ago, I change the exhaust and converter on my '79 TA. A true dual exhaust with Mopar converters. At that time, it was claimed that the Mopar converters were less restrictive than the OE or GM ones. Of course other mods were made, but the engine made significantly more power.

I wandering if the same could be done with a better flowing, less restrictive, converter without sacrificing low end torque?

I've modified my '00 F150 pretty heavily. My custom Superchip will be installed in the next couple of weeks. It replaces my Jet Stage II chip.

I would appreciate anyone having any information. And by the way, I'll also will be talking with Mike Troyer on this subject.

 

Don't spend a lot of money on a "high flow" cat. All cats made these days are a "monoblock" design, which is inherintly high flow. Summit and JCWhitney both sell CATCO high flow cats for ~$50 each. You'll need to get them welded in, but it's much cheaper than the aftermarket cats I keep seeing.

-Jay
98 F140 4x4 ORP
33x12.50 Pro Comp AT's
good brakes
K&N filter
Transgo shift kit on order