MaxHax

My MAC Headers with ORP will be hear tommorow.

I already have a 80 series Flow Master muffler, and Yank Torque Converter.

I will not be running any cats because I read the MAC Cats didn't flow well (worse than stock.)

I was also told I couldn't use my stock cats with MAC's.

My question is, is this going to be too loud?

I still have the chance to reject shipment that is due here tommorow by UPS. I do not want a crappy sounding car but the increased HP sounds good.

What are your opinions and what would you do?

Does anyone know of a site that has wav files etc of how this setup might sound before I install it?

Loud is OK just not crappy cheap sounding loud.

Thanks.

P.S.

My mods are listed here;

My web page

PatrickZ28

I use my stock cats with the Macs as does a friend of mine. What was the reason for not being able to use them? As for being too loud, I think with the 80 series muffler on, it shouldn't be that bad. For me, I wouldn't have an offroad Y just cause I'm afraid of a cop looking underneath my car.... I'd get gutted cats or something instead. Hope that helps.

MaxHax

Hi,

I was just told that with the MAC Header set with ORP they did not "match up" to the stock cats and that the MAC cats didn't flow well.

I have to decide by tommorow before UPS shows up.

Will I be happy with the sound? I do not have to smog my car for 5 years. So you are saying I can keep my stock cats and use the MAC headers with ORP? My car is pretty quiet right now.

Keep the headers or not?

sspooky

Well Max, you can't use your stock cats on the stock y-pipe, but you can (and I would say should) have someone cut them off the stock pipe, and weld them into your ORP. If you don't and a cop looks under your car for cats and they're not there, it's like a $2500 fine. <img src="gr_eek2.gif" border="0"> I say accept the shipment and put 'em on there - it'd be a nice add on for you, and you'll probably have to pay some lame *** restocking fee if you refuse 'em. I've heard a couple cars w/ Mac's and I like the way they sound.

You having HRH do this for you?

2002SS

MAC headers and ORP sounds like ***! It sounds very very raspy and untuned between 2200-2800 RPM. It will really **** you off.

Get the Off road pipe, then buy a set of Carsound 3" cats. They are the best cat on the market and flow better then stock. Then have a good muffler shop weld them in for you.

It will be loud and raspy until you get cats. Mac headers are great, but sound really bad without cats. Also you will need to buy a Flowmaster collector to replace the MAC collector where the Y pipe comes together. You will pick up some HP by replacing it. It is only a $50 part, plus the cost of having it welded in.

Dan

MaxHax

[quote] You having HRH do this for you? <hr></blockquote>

That was the plan but I just talked to Ralph and he said I can't use the stock cats and Random Tech cats are like 169 each!

Now I do not know what to do!

NastySSoo

Respectfully I ask, why would you now start asking about the sound, loudness of this system after you have already ordered it and it is due tomorrow? <img src="images/icons/confused.gif" border="0">

Reboot

iTrader: (5)

Max, Just have a single bullet muffler welded in the I pipe to get rid of the rasp. That's what I'm going to do.

Go to Ralph's and have him fire up my car, it's really quiet until you get on it.

MaxHax

As for why I ordered the Mac's it was on recommendations.

Reboot you private email.

Is it better to add high flow cats ($169.00 each)
or add billet muffler to reduce rasp with the MAC ORP setup?

TransAmDriver

If your worried about the converter, I have one CATCO 3" high flow converter that I'd sell you for $50, it only has 1k miles on it at the most and you could put it after the y-pipe.

MaxHax

Thanks Reboot I am gonna give your option a try if it is too raspy.

Can't wait to see what my car does after that.

[ March 06, 2002: Message edited by: MaxHax ]</p>

MaxHax

Can someone help me out for a CAT size there are several sizes listed. It will be for the MAC Headers with ORP from Thunder Racing.

I think I will feel much more comfortable with CATS (or is it just a fix it ticket in CA. if you are caught?)

If that is the case I will wait for the ticket and then add them :-)

Anyone know for sure? I have never heard of this "$2500.00 fine for headers."
That is pretty steep. <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

sspooky

The big fine isn't for headers, you get it if the cops check your cats, and you don't have any. I think it's like $1250/missing cat, and since we have 2, it comes to $2500. Not positive if that's exactly how it works, but you want to have cats (or at least something that looks like cats). Really. I promise.

RPM WS6

iTrader: (3)

Is it really so bad in CA that cops look under your car for cats? That’s nuts. The only time we worry about that crap is when going in for the test here in IL. I don’t have cats. I’ve spent the better part of two years without them. I’ve never heard of anybody getting a ticket for no cats from a cop here in IL.

If you’re really worried, just lower your car to where they really can’t see underneath. <img src="gr_images/icons/wink.gif" border="0"> I don’t see how they could really ticket you for that. Maybe force you to go to an inspection center within a certain amount of days or something, but I don’t see how they can really prove your not using cats unless they check your exhaust front to back, which they really can’t see all the way up front just by looking under the car. You don’t have to pop your hood for them.

MaxHax

[quote]Is it really so bad in CA that cops look under your car for cats? <hr></blockquote>

Yes, it really is that bad. I have read that they might even start doing spot checks.

Reboot, I went and listened to your car at HRH today, it sounded and looked awesome! Saw your Dyno charts too <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />

To avoid it all though I just ordered a set of Carsound Race Cats. Better safe than sorry and I hear they flow real well. Should sound better too. Expensive setup though but I should be low 12's. Ralph will also be adding a Tranny Cooler for me.

sspooky

Yes, we pay a price for the weather by having to deal with the government of the People's Republic of California. <img src="images/icons/rolleyes.gif" border="0">

Good move getting a tranny cooler. Everyone with a small converter should get one, especially with the temps that you get up in Sac. So, when are you going to hit the track?

MaxHax

[quote]So, when are you going to hit the track?
<hr></blockquote>

The only thing I want to do last is ASP pullies and tires but will have to wait.

I plan on trying to hit the Raceway on a Wed or Sat. It has been a rainy week though.

Curious to see how it does , like you said the Tranny Cooler is a must with my Yank. Ralph is putting it on the same day as my headers and Kenny Brown DD SFC weld ons.

FormulaWS6

you are going to need tires with that TC if you even want to think about running a mid 12.
Most likely with a TC and street tires, you will run 13s at SAC. A couple guys I know have done that same thing. <img src="gr_grin.gif" border="0">

MaxHax

I'm hoping to borrow someones tires for my first run until I can afford tires.

I do not have much traction at all.