Test pipes

Jordo! · 12-05-2010, 05:20 PM

The OEM cats creating a restriction, and slow down exhaust pulses.

Replacing them with either higher flowing cats or completely unrestricted pipes (i.e. test pipes) will improve exhaust flow, resulting in more power.

they will improve power with the OEM exhaust and should also bolt up to any aftermarket exhaust, unless it includes test pipes or high flow cats.

Both cats and test pipes are deleted with headers.

germanattitud · 12-05-2010, 05:22 PM

I'm assuming it will make acceleration even more louder?

Jordo! · 12-05-2010, 05:24 PM

Quote:

Originally Posted by germanattitud

I'm assuming it will make acceleration even more louder?

Exhaust note gets a bit louder; main issue is that you get a noticeable rasp/rattle sound at about 2.7K RPM. If that will bother you, see about getting a set of resonated TP's or HFC's.

You can probably find sound clips in the big exhaust thread.

germanattitud · 12-05-2010, 05:27 PM

HFC's will allow more flow too correct? how are HFC's different from test pipes? or are they the same pretty much?

Jordo! · 12-05-2010, 05:53 PM

Quote:

Originally Posted by germanattitud

HFC's will allow more flow too correct? how are HFC's different from test pipes? or are they the same pretty much?

HFC's are simply higher flowing catlytic converters. They won't flow quite as well as two plain hunks of pipe which is what test pipes are.

The difference is probably about 2 - 3% potnetial gain or about 4-6 whp between them. Possibly 1-2 whp more, but definitely not less.

The major difference is cost; HFC's tend to be quite a bit more expensive that TP's. Add more to the cost if you get resonated ones.

HFC's are more environment friendly, so that's plus (if that matters to you).

Both may result in CEL's (search for details why) and neither is a guarantee of passing an emissions test (not that this is an issue in FL).

CBRich · 12-05-2010, 08:15 PM

Quote:

Originally Posted by Jordo!

Both cats and test pipes are deleted with headers.

With long tube headers.

Jordo! · 12-05-2010, 08:25 PM

Quote:

Originally Posted by CBRich

With long tube headers.

Are there any aftermarket headers that aren't long tube?

12-05-2010, 05:20 PM	#1 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	The OEM cats creating a restriction, and slow down exhaust pulses. Replacing them with either higher flowing cats or completely unrestricted pipes (i.e. test pipes) will improve exhaust flow, resulting in more power. they will improve power with the OEM exhaust and should also bolt up to any aftermarket exhaust, unless it includes test pipes or high flow cats. Both cats and test pipes are deleted with headers. __________________ Enjoy it. Destroy it. Last edited by Jordo!; 12-05-2010 at 05:23 PM.

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12-05-2010, 05:22 PM	#2 (permalink)
germanattitud Base Member Join Date: Dec 2010 Location: Florida Posts: 83 Drives: 40TH ANNIVERSARY #21 Rep Power: 15	I'm assuming it will make acceleration even more louder?

12-05-2010, 05:27 PM	#4 (permalink)
germanattitud Base Member Join Date: Dec 2010 Location: Florida Posts: 83 Drives: 40TH ANNIVERSARY #21 Rep Power: 15	HFC's will allow more flow too correct? how are HFC's different from test pipes? or are they the same pretty much?