Hi rj,

It's really a matter of the results you want...

For those who wan the very best TORQUE results, which is what I think is most important, then go with our SISO (SingleIn/SingleOUt) - it exists right behind the right rear wheel in a beautiful 4' polished S/S tip, and looks very nice. This s what we run on our SUPERCHARGED F-150!

If you are looking for the "classic" pickup truck dual exhaust look, then go with our SIDO (SingleIn/DualOut), which exists right under neath the rear bumper and looks great, and sounds a little bit more aggressive.,

I personally do not like the Lightning-look style, simply because it does not replace the entire intermediate pipe.

Hat I really suggest is to give us a call when you can, and we'll be happy to go over this in proper detail with you, get you some pics, etc., so just give us a quick call at our number listed below when you get a chance, OK?

Good luck!

 

Mike - How much of a torque increase do you think I would see with Hi-flow's? I'm considering going with them, But I'll Have to save up more $$$, I just spent it all on an XCAL2, Underdrives, and an AF1.

 

Hi Kickin,

That's an excellent and really tough question, because it's primarily a matter of *part-throttle* torque, and that is not easy to test for properly & accurately.

To do that *properly*, you have to be on a solid eddy-current dyno and be able to set the truck at numerous different exact throttle % openings & rpms - we've done a lot of that very type of testing over the years in our intake & exhaust system work, and it's grueling - I really wouldn't wish it on anyone - though the data-hound in me does love the info once it's all over!

At full-throttle, the torque gains are from idle to about 3000 rpm or so, and on part-throttle, from idle up thru 4000+ rpm. Exact numbers on *your* truck? I really can't tell you, as each vehicle differs (especially as it ages & has other mods), and we're talking about a 1997 vehicle with some other mods on it - so all I can really do is give you a "guesstimation," I suppose........

I'd say you should see roughly about 12-18 lbs./ft. of torque across the board, and you may well see over 20 lb/ft. in some areas. I've seen some trucks have it make the difference as to whether they could spin the tires off the line at all or spin them pretty hard - now that sounds like a big dramatic gain, but that really isn't required to make that kind of difference - just enough more torque at just the right place can make that kind of difference, depending a a given vehicle's weight & configuration - you know how all that goes, I'm sure.

I think that's about as close a guess as I could really try to make.

But the additional torque really isn't the reason to do it - the reason to add on a set of *quality* high flow cats (and the only ones I would recommend are Magnaflow) are to get legal and not pollute the atmosphere, as well as gain some torque and NOT lose any horsepower or very nice sound in the process - you know? At least, that's my opinion, & how *I* feel about it - and I guess that's all I can really express, is how I feel about it.

I understand all too well when the budget has had a big dent put in it already form other mods, some things just have to wait! Whenever you get around to giving it some serious thought, give us a call & we can go over all of that with you (costs, installation, etc.), as it's really not as expensive as most people might think it is.

I hope that info is of some help to you, & good luck!