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Low dollar single in/out catback info/vids

This is a discussion on Low dollar single in/out catback info/vids within the External Engine forums, part of the LSx Technical Help Section category; Got tired of being teased about running my stock catback, and probably choking off some horsepower, so I finally swapped ...

  1. #1
    TunedByFrost supporter rel3rd's Avatar
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    Cranberry Red
    1971 Chevelle SS 402

    Smile Low dollar single in/out catback info/vids

    Got tired of being teased about running my stock catback, and probably choking off some horsepower, so I finally swapped it out. Keep in mind I already had a Borla adjustable and a Magnaflow...didn't like the sound of either, so stuck with the stocker for most of the Summer. Ironically, the new setup sounds damn near identical to the Magnaflow, lol...Maybe the new setup will free up a tenth or so. Car went 11.67@115 with stock catback FWIW.

    I pieced it together for about 175 bucks total and the car actually "feels" better at most any rpm when driving.

    Parts used:
    $54.39 Dynomax #54064 I pipe
    $66.39 Dynomax #53061 over axle pipe
    $25.00 Force Pro-Series 3" chambered muffler (new, but secondhand)
    $21.98 Riker 3" 90* elbow
    $18.98 Riker 3" turndown spout
    Five 3" Stainless steel band clamps (already had)

    I did have to make/weld a hanger onto "tailpipe", but was able to use stock rubber hanger. I need to figure out how to keep exhaust from "moving"...It sort of moved around with stock catback as well. It doesn't hit anything, but in last video, you'll see what I mean by "move", lol.

    Here's a couple quick videos...
    One of car idling and revved, a couple others taken in-car, and another quick warm idle vid...





    2002 Silverado Z71 ECSB HPTuners tuned by yours truly
    2000 Pontiac Trans Am WS6 6.0, 4L80E, Rear mount Turbo, etc...
    webpage: http://www.fquick.com/rel3rd/

  2. #2
    Wants to be Snowboarding FuhBreezeE's Avatar
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    Stg IV a4
    '99 TA Ws777

    Nice write-up and sounds great

  3. #3
    TunedByFrost supporter rel3rd's Avatar
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    Cranberry Red
    1971 Chevelle SS 402

    Thumbs up

    Thank you.

  4. #4
    Member 180ls1's Avatar
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    1998 Firebird Formula WS6

    thanks for that now i have a perfect diagram for my exhaust

  5. #5
    TunedByFrost supporter rel3rd's Avatar
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    Cranberry Red
    1971 Chevelle SS 402

    Quote Originally Posted by 180ls1 View Post
    thanks for that now i have a perfect diagram for my exhaust
    Glad I could help.


  6. #6
    Firebird Encyclopedia 9T8W66's Avatar
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    Navy Blue Metallic
    `98 Formula M6 HdTp

    Very Nice and sounds great.
    Flowmaster sells a kit that is very similar (part# 17134) except it doesn't have a turndown, the tailpipe comes straight out and is slash cut. It uses a 2 chamber 40 series muffler. I've had it on my car for 8 yrs.
    Craig
    Semi Retired Street Racer
    2012 Lava Red Mustang GT Coupe Brembo/3.73's
    Build Date 3/17/11, Last Lava Red GT

    Gone but not forgoten
    NBM `98 Formula M6 HdTp
    1 of 1 Build Date 3/12/98

  7. #7
    TunedByFrost supporter rel3rd's Avatar
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    Cranberry Red
    1971 Chevelle SS 402

    Quote Originally Posted by 9T8W66 View Post
    Very Nice and sounds great.
    Flowmaster sells a kit that is very similar (part# 17134) except it doesn't have a turndown, the tailpipe comes straight out and is slash cut. It uses a 2 chamber 40 series muffler. I've had it on my car for 8 yrs.
    Wow, didn't know that. Any vids of yours?
    Or does it pretty much sound the same as mine?

  8. #8
    Firebird Encyclopedia 9T8W66's Avatar
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    Navy Blue Metallic
    `98 Formula M6 HdTp

    Sorry no vids but it does sound similar to yours.
    The Kit is listed for `95-97 Dual cat LT1 cars but it will fit LS1's cause the Ypipes exit in the same location. the only addition i did to mine was I added a 18" long 3.5" slash cut Stainless tip.
    This is the only pic that I have and there isn't much to see

  9. #9
    TunedByFrost supporter rel3rd's Avatar
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    Cranberry Red
    1971 Chevelle SS 402

    hmmm...learn something new everyday.

    Good looking car!

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