Straight pipe from the cat back - The 1947 - Present Chevrolet & GMC Truck Message Board Network

61_FL_Apache · 01-11-2015, 07:29 PM

I installed a Flowmaster cat back some years ago on my 97 Tahoe. It was not loud enough for me but it still sounds ok, however, I would like to go louder.

I found a few YouTube videos of some with straight pipes from the cat back and they sound great. Having the cats in there helps tone it down a little.

I found this on ebay and thought about using it with a couple of turndowns. It should dump just ahead of the rear end.

http://www.ebay.com/itm/Walker-Exhau...bc54ba&vxp=mtr

Has anyone done a setup like that? If so, do you have pics or video of it?

Thanks for your input!

JJR · 01-11-2015, 09:52 PM

When I first got my 99 C2500 CrewCab off EBay, it was advertised as having a new exhaust. Did not know that meant new pipes from the cats back and no mufflers. It was way to loud for my liking and they existed out the back. Having them dump ahead of the rear axle will even be louder but if that is what your after, you won't be disappointed.

BigBlocksRule · 01-12-2015, 08:37 AM

Since your passenger compartment is above the rearend, don't dump them under the car, take 'em outside. It doesn't take long at idle for exhaust gasses to find their way in.

1997z71 · 01-12-2015, 09:07 AM

I think it will be way too loud too. I have a flowmaster on my 97 out the back with 4" tips. Even that was too loud for the law. I got a warning in Tn.
They said they are getting many noise complaints and cracking down. I put small baffles in the tips,sounds much better now.

I'm now vacationing in the Daytona Fl area,and a guy came to talk to me about my truck. He said Daytona and other areas in Fl have been issuing tickets for excessive noise on vehicles and motorcycles.

61_FL_Apache · 01-12-2015, 06:54 PM

Good point about fumes under the truck.. They don't give us too much flack in So FL about noise..

Tom · 01-12-2015, 07:09 PM

Get an electronic cutout right before your muffler...then you can have your cake and eat it too.

Marty68 · 01-12-2015, 07:15 PM

i did an 85 305 3.08 gears. it was a DOG. i made a single 2.5 inch pipe exiting after rear tire. HUGE improvement over single 2.5 into muffler single 2" exiting. it wasnt too loud but my friend did his 350 suburban the same but used 3" it was too loud. maybe my cat was plugged.

01-11-2015, 07:29 PM	#1
61_FL_Apache Who Me? Join Date: Sep 2010 Location: Royal Palm Beach, FL Posts: 4,071	Straight pipe from the cat back I installed a Flowmaster cat back some years ago on my 97 Tahoe. It was not loud enough for me but it still sounds ok, however, I would like to go louder. I found a few YouTube videos of some with straight pipes from the cat back and they sound great. Having the cats in there helps tone it down a little. I found this on ebay and thought about using it with a couple of turndowns. It should dump just ahead of the rear end. http://www.ebay.com/itm/Walker-Exhau...bc54ba&vxp=mtr Has anyone done a setup like that? If so, do you have pics or video of it? Thanks for your input! __________________ Steve 1997 Tahoe LT 4D 2WD (DD) 2001 Blazer 4D 2WD 1961 Apache 10 (sold) 1965 C10 Stepper (sold)

01-11-2015, 09:52 PM	#2
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	Re: Straight pipe from the cat back When I first got my 99 C2500 CrewCab off EBay, it was advertised as having a new exhaust. Did not know that meant new pipes from the cats back and no mufflers. It was way to loud for my liking and they existed out the back. Having them dump ahead of the rear axle will even be louder but if that is what your after, you won't be disappointed. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

01-12-2015, 08:37 AM	#3
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Straight pipe from the cat back Since your passenger compartment is above the rearend, don't dump them under the car, take 'em outside. It doesn't take long at idle for exhaust gasses to find their way in.

01-12-2015, 09:07 AM	#4
1997z71 Registered User Join Date: Oct 2013 Location: nash,tn Posts: 41	Re: Straight pipe from the cat back I think it will be way too loud too. I have a flowmaster on my 97 out the back with 4" tips. Even that was too loud for the law. I got a warning in Tn. They said they are getting many noise complaints and cracking down. I put small baffles in the tips,sounds much better now. I'm now vacationing in the Daytona Fl area,and a guy came to talk to me about my truck. He said Daytona and other areas in Fl have been issuing tickets for excessive noise on vehicles and motorcycles.

01-12-2015, 06:54 PM	#5
61_FL_Apache Who Me? Join Date: Sep 2010 Location: Royal Palm Beach, FL Posts: 4,071	Re: Straight pipe from the cat back Good point about fumes under the truck.. They don't give us too much flack in So FL about noise.. __________________ Steve 1997 Tahoe LT 4D 2WD (DD) 2001 Blazer 4D 2WD 1961 Apache 10 (sold) 1965 C10 Stepper (sold)

01-12-2015, 07:09 PM	#6
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,763	Re: Straight pipe from the cat back Get an electronic cutout right before your muffler...then you can have your cake and eat it too. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

01-12-2015, 07:15 PM	#7
Marty68 Registered User Join Date: Nov 2014 Location: west coast, Wi Posts: 534	Re: Straight pipe from the cat back i did an 85 305 3.08 gears. it was a DOG. i made a single 2.5 inch pipe exiting after rear tire. HUGE improvement over single 2.5 into muffler single 2" exiting. it wasnt too loud but my friend did his 350 suburban the same but used 3" it was too loud. maybe my cat was plugged.



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