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post #1 of 14 Old 01-01-2008, 09:39 PM Thread Starter
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Test Pipes

Has anyone heard of a test pipe? I'm looking for one but all i can find are for older s10's. my truck is a 98. I don't want to just hack off the cat incase the VET laws ever come back. any help?

http://cgi.ebay.com/ebaymotors/TEST-...spagenameZWDVW


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post #2 of 14 Old 01-02-2008, 01:30 PM
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Re: Test Pipes

Why do you want one? I've had experience with no cat, stock cat, and high flow cat and I can honestly say there is just about no reason to not run a cat on a daily driver.

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post #3 of 14 Old 01-02-2008, 04:32 PM
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Re: Test Pipes

^^^^


What he said.

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post #4 of 14 Old 01-02-2008, 11:36 PM Thread Starter
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Re: Test Pipes

i was just curious about the ''so called'' hp gain and the sound it made without one. I never was really sure about them. thanks for the input

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post #5 of 14 Old 01-02-2008, 11:54 PM
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Re: Test Pipes

the sound is only noticeable if you have an open exhaust system. there will be around a 5% mileage and hp gain but again, not that worth it unless you're a hardcore every last hp builder. oyea and if you have any sort of inspections...they frown on it...a lot.

if you really want one, just buy a bit of straight pipe and U bolt it in place if you can. or weld similar flanges to the end of a pipe and bolt it in. I've done both, both are easy and not all that worth it.

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post #6 of 14 Old 01-03-2008, 12:06 AM Thread Starter
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Re: Test Pipes

Quote:
Originally Posted by kamesama980 View Post
the sound is only noticeable if you have an open exhaust system. there will be around a 5% mileage and hp gain but again, not that worth it unless you're a hardcore every last hp builder. oyea and if you have any sort of inspections...they frown on it...a lot.

if you really want one, just buy a bit of straight pipe and U bolt it in place if you can. or weld similar flanges to the end of a pipe and bolt it in. I've done both, both are easy and not all that worth it.

yea but what would i do with the o2 sensor. i put a high flow hollow cat on my buddys 99 Si and it made the check engine come and say bad o2 sensor.

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post #7 of 14 Old 01-03-2008, 12:06 PM
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Re: Test Pipes

There may be a slight MPG gain but there certainly will not be a 5% HP gain. I liked the sound of no cat with a free flowing exhaust as well, but then I got tired of the gas smell and flaky O2 simulator so I had a Spintech 3" high flow cat put on...it had pretty much the same sound as without a cat. Some people do have issues with the SES and a high flow cat some don't, the best way is to have the post-cat O2 sensor related trouble codes disabled using a custom tune (like wait4me or pcmforless).

2004 Silverado Z71 ECSB - |Silver Birch Metallic|5.3|Custom Single Exhaust|Method Standards
1993 Mustang LX Hatchback - |Reef Blue|5.0 H.O.|5 Speed|MGW Short Shifter|70MM MAF|MAC Shorty Headers|Pypes O/R X|Spintech Pro Streets|3.55's|
1984 El Camino Conquista - |Black|5.0L|Quadrajet|TH250c|Flowmaster Duals|2.41 open rear|

Last edited by MINTSICK; 01-03-2008 at 12:07 PM.
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post #8 of 14 Old 01-03-2008, 01:44 PM Thread Starter
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Re: Test Pipes

how much did that spintech cat cost? I've heard of pcmforless but never looked into it.

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post #9 of 14 Old 01-03-2008, 04:08 PM
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Re: Test Pipes

Quote:
Originally Posted by wizzlenator502 View Post
yea but what would i do with the o2 sensor. i put a high flow hollow cat on my buddys 99 Si and it made the check engine come and say bad o2 sensor.
You can tune it out, like Mint said, or you can buy an aftermarket cat with the 02 sensor bung already welded in (Maganaflow i know for sure has a few part numbers w/ the 02 included), or simply have the shop you go to weld an 02 sensor bung just behind the cat, and run the sensor there. In the event the sensor doesn't like the "high-flow" aftermarket piece, then you can allows block off the bung and go the de-tune route as previously mentioned.

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post #10 of 14 Old 01-03-2008, 09:49 PM
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Re: Test Pipes

Quote:
Originally Posted by wizzlenator502 View Post
how much did that spintech cat cost? I've heard of pcmforless but never looked into it.
It was right around $100 with shipping I believe.

2004 Silverado Z71 ECSB - |Silver Birch Metallic|5.3|Custom Single Exhaust|Method Standards
1993 Mustang LX Hatchback - |Reef Blue|5.0 H.O.|5 Speed|MGW Short Shifter|70MM MAF|MAC Shorty Headers|Pypes O/R X|Spintech Pro Streets|3.55's|
1984 El Camino Conquista - |Black|5.0L|Quadrajet|TH250c|Flowmaster Duals|2.41 open rear|
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post #11 of 14 Old 01-04-2008, 01:48 AM Thread Starter
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Re: Test Pipes

cool, i think on my friends honda it said it was reading to cold or something.

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post #12 of 14 Old 01-04-2008, 02:25 PM
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Re: Test Pipes

you could always put a sim on it if you dont want to get a tune done. that way if you go back to cat you can hook the sensor back up.

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post #13 of 14 Old 01-04-2008, 06:16 PM
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Re: Test Pipes

yea, options for 2nd cat (I've never had to work on a car with a 2nd cat. repair or upgrade) but you can either reinforce, drill, and tap it or do an O2 simulator mod If you don't mind the test pipe legality you don't mind the o2 sim legality.

the mileage/power gain depends on the engine, exhaust system, and cat condition. I've seen cars gain more than 5%, I've seen cars have no measurable change.

-Russell
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post #14 of 14 Old 01-04-2008, 11:07 PM Thread Starter
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Re: Test Pipes

a friend of mine cut the cats of his mustang and he said he had to use MIL Eliminators for 2 of his o2 sensors. he said they got them in jegs and summit

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