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04-10-2008, 02:48 AM
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#1 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Dyno Don headers and 4in Mufflex
__________________ Wide Open Till You See GOD ...Then Brake
If You Are Upside Down And on Fire....Its To Fast
Sex should be like a riced out honda, slow, obscene, and loud enough to wake the neighbors.
89 T/A 406 Roller |
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04-10-2008, 02:49 AM
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#2 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Headers on the car:
Dyno Don headers do not hit the steering shaft the way the SLP's sometime do.
The plug access is great. You also don't have do dent any tubes to clear spark plug boots.
I finally took the car to the exhaust shop yesterday. I had bought a used 4 inch Mufflex system off a board member a while back. This thing is huge. The guy that did my exhaust did a awesome job.
Driver side:
Passenger side:  |
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04-10-2008, 02:51 AM
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#3 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Y pipe: 
The y pipe is 2 1/2 into a merge. The merge is 4in O.D. and the Mufflex pipe is 4in I.D. so the two slide together. I hope this creates a scavenging effect and not turbulence.
Mufflex:
The ground clearance is really good. The car is lowered with Summit springs(pro kit) and I can fit a soda can under the lowest point. I will try to get pics of that soon.
I am very happy with the hole system. The headers fit great. The y pipe is awesome and so is the Mufflex. My exhaust guy beat the rear seat up little bit so he could tuck the pipe closer to the body. He said where it went over the axle there were a few problems but he fixed them, with a hammer I would imagine.
I hope to have the car running Sunday. I will get sound clips as soon as I can.
Jason |
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04-10-2008, 02:16 PM
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#4 | | Senior Member
Join Date: Sep 2003 Location: Cypress, California
Posts: 4,296
Car: 1989 GTA Engine: 355 TPI Transmission: 700R4 Axle/Gears: 3.70 Nine Bolt | Re: Dyno Don headers and 4in Mufflex Looking good and thanks for posting the pictures. I see the tubular K member gives you more clearance for the exhaust by the oil pan. That might help me with a custom exhaust I'm thinking about. I have almost the same setup but into a 3 1/2" Mufflex system. |
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04-10-2008, 03:20 PM
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#5 | | Senior Member
Join Date: Sep 2003 Location: pittsburgh, Pa
Posts: 9,044
Car: 89 Iroc-z Engine: Stealth Ram 383 Transmission: Beefed 700R-4 Axle/Gears: 4th gen 10 bolt 3.42's | Re: Dyno Don headers and 4in Mufflex i wish i could get a tubular k member  those are soo nice looking
very nice setup you got there |
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04-11-2008, 05:07 AM
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#6 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by Orr89RocZ i wish i could get a tubular k member  those are soo nice looking
very nice setup you got there | Thank you. It's taken a long time to get it together. |
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04-11-2008, 06:10 PM
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#7 | | Senior Member
Join Date: Sep 2004 Location: ky
Posts: 371
Car: 1992 Camaro ZO3 Engine: 350 Transmission: 700R4 Axle/Gears: 9 bolt/3.70's | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by LilJayV10 Thank you. It's taken a long time to get it together. | Must have sound |
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04-12-2008, 10:23 AM
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#8 | | Senior Member
Join Date: Jul 2000 Location: Prince George, BC, Canada
Posts: 1,301
Car: 89 GTA Engine: 5.7L Supercharged Transmission: T-56 Axle/Gears: Moser 9" 3.70 | Re: Dyno Don headers and 4in Mufflex Nice setup, wish Dyno Don would have sent out out the headers he made for me but was to anal to sit in line at the post office cause he was scared of the extra paper work involved to ship across the border
Anyways do you have pic's of the the exhaust ports on Don's headers, like to see how they compare to my Stainless works 1 3/4 LT's?
__________________ 89 T-Top GTA 5.7L T-56
ATI procharger D1sc, AS&M SS runners, accel base, 58mm TB, 42Ibs injectors, full exhaust, McLeod Street twin, Moser ford 9" with 3.70, 18" Boyd Smoothie II wheels 8"/10", DIY prom with code59.
Items to be installed: AFR 195 eliminator heads, zz9 cam, Stainless works LT 1 3/4 headers, Mufflex 4" catback http://www.cardomain.com/ride/2480939 |
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04-12-2008, 11:18 AM
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#9 | | Senior Member
Join Date: Mar 2000 Location: Orange, CA
Posts: 3,491
Car: '90 Trans Am-12.63@108.69 Engine: 355 w/E-Tec 200's Transmission: Tremec T-56 Axle/Gears: 12 Bolt 3.73 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by Tony89GTA Nice setup, wish Dyno Don would have sent out out the headers he made for me but was to anal to sit in line at the post office cause he was scared of the extra paper work involved to ship across the border | You're not very nice.
I'm not in the shipping business, I have a backlog of work to do and others that are waiting in line.
Others have made arrangements to get theirs shipped statewide which I have done.  |
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04-12-2008, 11:44 AM
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#10 | | Senior Member
Join Date: Nov 2002 Location: Lynchburg, VA
Posts: 1,175
Car: 89 formula 350 Engine: 355 L98 Miniram Transmission: T56 Axle/Gears: 3.45 9 bolt | Re: Dyno Don headers and 4in Mufflex Hey, Dyno Don!
I don't know you or your products. This post is the first I've heard of you!!
I have a sert of the SLP 1 3/4" headers like the original poster had. I paid to have a y pipe made, and its crappy 2.25" tubing and its semi kinked. Its a total bottleneck.
Will your Y Pipe work with my headers? My car is lowered. Will it work? Can you PM me some details and pricing etc? |
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04-12-2008, 01:22 PM
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#11 | | Senior Member
Join Date: Mar 2000 Location: Orange, CA
Posts: 3,491
Car: '90 Trans Am-12.63@108.69 Engine: 355 w/E-Tec 200's Transmission: Tremec T-56 Axle/Gears: 12 Bolt 3.73 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by Justin89Formy Hey, Dyno Don!
I don't know you or your products. This post is the first I've heard of you!!
I have a set of the SLP 1 3/4" headers like the original poster had. I paid to have a y pipe made, and its crappy 2.25" tubing and its semi kinked. Its a total bottleneck.
Will your Y Pipe work with my headers? My car is lowered. Will it work? Can you PM me some details and pricing etc? | No, mine are unique.
Here are some pictures:  |
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04-12-2008, 02:04 PM
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#12 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Here's a pic of the exhaust ports
Here's a pic w/ the Earl's gasket Dyno Don uses
Collector
Dyno Don,
The guy that did my exhaust was really impressed with your headers and y pipe. |
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04-12-2008, 02:27 PM
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#13 | | Senior Member
Join Date: Sep 2003 Location: Cypress, California
Posts: 4,296
Car: 1989 GTA Engine: 355 TPI Transmission: 700R4 Axle/Gears: 3.70 Nine Bolt | Re: Dyno Don headers and 4in Mufflex Tony89GTA: Throw in another $20 and I will go stand in line at the post office.  |
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04-12-2008, 04:34 PM
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#14 | | Junior Member
Join Date: Jan 2007
Posts: 9
| Re: Dyno Don headers and 4in Mufflex Hello Don, i was wondering if you offer a stepped/Merge collector style header ? 1-5/8 to 1-3/4 with merge-collectors... if so what thickness flanges do you use and what would they cost ??? Nice work by the way. |
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04-12-2008, 08:48 PM
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#15 | | Senior Member
Join Date: Nov 2005 Location: Columbus
Posts: 323
Car: 89 Camaro rs. Engine: 357 t88 turbo motor Transmission: Powerglide Axle/Gears: 3.55 | Re: Dyno Don headers and 4in Mufflex where did you get the mufflex 4" exh kit? i might need one. |
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04-14-2008, 01:56 AM
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#16 | | Senior Member
Join Date: Jul 2000 Location: Prince George, BC, Canada
Posts: 1,301
Car: 89 GTA Engine: 5.7L Supercharged Transmission: T-56 Axle/Gears: Moser 9" 3.70 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by 1989GTATransAm Tony89GTA: Throw in another $20 and I will go stand in line at the post office.  | Hey I even offered him $50 more to do that and still got turned down, go figure  |
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04-14-2008, 01:47 PM
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#17 | | Senior Member
Join Date: Sep 2003 Location: Cypress, California
Posts: 4,296
Car: 1989 GTA Engine: 355 TPI Transmission: 700R4 Axle/Gears: 3.70 Nine Bolt | Re: Dyno Don headers and 4in Mufflex I live within 10 miles of Dyno Don's shop. For that money I will stand in line at the post office and ship them to you. Contact Don. I know why he does not want to stand in line at the post office as he is a very busy man.  |
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04-14-2008, 03:56 PM
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#18 | | Senior Member
Join Date: Aug 2002 Location: Toronto, Ont
Posts: 2,304
Car: '88 IROC Engine: 383ci. Transmission: 700R4 Axle/Gears: 3.70 | Re: Dyno Don headers and 4in Mufflex Awesome looking setup. Bet it will be loud as hell too.
LilJayV10, do you have anymore pics of your car? That thing looks like a beast! |
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04-15-2008, 01:21 AM
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#19 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by mattsv8_03 where did you get the mufflex 4" exh kit? i might need one. |
You can get one from mufflex's website or try to find one used like I did. The catback is around $650 or so. I got one used for around $200.
Demon355,
Thank you for the compliment. Here's a link to my thread on the build of my car. http://www.thirdgen.org/techboard/fi...r-finally.html |
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04-15-2008, 08:16 AM
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#20 | | Senior Member
Join Date: Jul 2000 Location: Prince George, BC, Canada
Posts: 1,301
Car: 89 GTA Engine: 5.7L Supercharged Transmission: T-56 Axle/Gears: Moser 9" 3.70 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by 1989GTATransAm I live within 10 miles of Dyno Don's shop. For that money I will stand in line at the post office and ship them to you. Contact Don. I know why he does not want to stand in line at the post office as he is a very busy man.  | Ah wouldn't worry about it after looking at the ports kind of not impressed, that was my main reason for switching from SLP's, but thanks anyways
LilJayV10 you get any rattles from your 4" mufflex? I might pick up one for myself. |
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04-15-2008, 08:27 AM
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#21 | | Senior Member
Join Date: Jun 2002 Location: Wonderful Robins, GA
Posts: 8,202
Car: camaro sportcoupe Engine: flenstones Transmission: lost Axle/Gears: 41/9 | Re: Dyno Don headers and 4in Mufflex dyno don, you planning on any longtubes in the near future? right now it's lookin' like doug's headers are the way to go with longtubes...also, where do you get those badass looking headers gaskets? |
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04-16-2008, 04:27 AM
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#22 | | Senior Member
Join Date: Jan 2001 Location: Evansville,IN,USA
Posts: 1,889
Car: 89' T/A, 00' Firehawk Engine: 406 Roller Transmission: TH700R4 w/2800 stall Axle/Gears: 3.23 Posi | Re: Dyno Don headers and 4in Mufflex Here's a link to the header gaskets. http://store.summitracing.com/partde...0&autoview=sku
If he made long tubes and tucked them up, I'd probably try them too.
I had the Hooker LT's before and they hang low, especially on a lowered car. |
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04-16-2008, 11:51 AM
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#23 | | Senior Member
Join Date: Mar 2000 Location: Orange, CA
Posts: 3,491
Car: '90 Trans Am-12.63@108.69 Engine: 355 w/E-Tec 200's Transmission: Tremec T-56 Axle/Gears: 12 Bolt 3.73 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by mw66nova dyno don, you planning on any longtubes in the near future? right now it's lookin' like doug's headers are the way to go with longtubes...also, where do you get those badass looking headers gaskets? | No, sorry I'm not.
I have enough trouble keeping up with these. |
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04-17-2008, 11:02 AM
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#24 | | Moderator
Join Date: Jul 1999 Location: Disneyland, SoCal
Posts: 9,312
Car: 1991 Camaro Z28 Engine: 350 L98 siamesed runners Transmission: LT1 T56 Axle/Gears: 9-Bolt 4.10 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by mw66nova dyno don, you planning on any longtubes in the near future? right now it's lookin' like doug's headers are the way to go with longtubes...also, where do you get those badass looking headers gaskets? | He builds these because SLP stopped making theirs. You can still buy longtubes out there so there is no need for him to make some more.
The header gaskets are from Earl's. |
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04-17-2008, 11:26 AM
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#25 | | Senior Member
Join Date: Jun 2002 Location: Wonderful Robins, GA
Posts: 8,202
Car: camaro sportcoupe Engine: flenstones Transmission: lost Axle/Gears: 41/9 | Re: Dyno Don headers and 4in Mufflex  there's still a bunch of other shortie headers being made, slp wasn't the only game in town...that seems like kind of a silly reason to build headers. guess i'll be going with doug's...the hedmans are going to be a restriction at some point... |
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04-17-2008, 07:52 PM
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#26 | | Senior Member
Join Date: Mar 2000 Location: Orange, CA
Posts: 3,491
Car: '90 Trans Am-12.63@108.69 Engine: 355 w/E-Tec 200's Transmission: Tremec T-56 Axle/Gears: 12 Bolt 3.73 | Re: Dyno Don headers and 4in Mufflex Quote:
Originally Posted by mw66nova  there's still a bunch of other shortie headers being made, slp wasn't the only game in town...that seems like kind of a silly reason to build headers. guess i'll be going with doug's...the hedmans are going to be a restriction at some point... | | | | |