aschold

iTrader: (7)

Right now the only missing link in my exhaust on my VIII is a test pipe. After seeing the gains that people have made from getting rid of the cat, I'm really considering it before my reflash. However, when I bought this car I told myself I wouldn't modify it in anyway that was going to get me tickets, because that was the problem with all my other vehicles.

My question is, being that I already have aftermarket 02 housing/dp/catback, would a test pipe make it marginally louder?

zeus1

iTrader: (19)

it will make it louder for sure especially if you have the stock cat in now. you can always weld in a resonator to quiet it down a bit.

Redline-Z

iTrader: (1)

If you are worried about sound just get a good quality HFC, it won't restrict you that much and on stock turbo you will make power with it.

TxEvo8

iTrader: (5)

I noticed that it is louder at idle, but only a little louder at WOT.

evo8426

iTrader: (27)

get the milspec 100 cat..it flows almost like a test pipe and it keeps the car legal

Ruthless.

iTrader: (22)

honestly, i threw a testpipe on and as posted above, the only time it was really louder was @ idle and a little deeper @ WOT.

rcheung

iTrader: (15)

I noticed almost no difference in noise from a testpipe to perrin HFC. It could be due to my greddy SP2 exhaust which is pretty quiet to begin with.

rlui0514

iTrader: (2)

^ Greddy Catbacks are usually pretty quiet unless its the full Ti one... but i noticed a huge difference when i went from cat to no cat... esp @ WOT like other people have said... It does attract alot of attention from PO PO and its illegal for the street... but go for it anyway

FastLearner

iTrader: (16)

Mil-Spec 100 Cat On my custom 3" Carbon/Ti set-up no test made it WAY louder under WOT.

SmurfZilla

iTrader: (33)

Just get a TBE from someone like Greddy....its loud all the time. Problem solved. LOL.

Meanmachine04

Yes it is

aschold

iTrader: (7)

I don't really care about it being loud under WOT, I'm not going to be banging through gears if I'm riding next to a cop, I'm kind of more concerned about how much louder it will sound during normal driving.

nicolas916

Cobb exhaust with testpipe and dp. Before I had the testpipe on, I had no problems driving long distances. After the testpipe, now its a bit irratating on long drives. No problems daily driving, just the constant I wanna call it mild droning becomes irratating after a while on the freeway.

Jim in Tucson

iTrader: (3)

With a test pipe your EVO will sound a little louder in normal driving, but it will definitely be louder at WOT. The test pipe is one of the best ROI mods for the EVO; best gain per dollars spent.

BEST VALUE MODS
1. Test pipe
2. MBC
3. IX/JDM DV (assuming your OEM DV leaks)
4. E85 tune (including Walbro and injectors)

aschold

iTrader: (7)

Have all of those things except the test pipe obviously, and E85 is not an option for me because there is nowhere to get it around here.