Dyno Don headers and 4in Mufflex
#1
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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
I thought I would post my exhaust setup here. I know not everyone cruises the readers section.
I had bought a set of 1 3/4 SLP headers a long time ago to put on my 406. I also ended up buying a set of AFR eliminator 195 heads a few months ago. I found the ports on the SLP's were smaller than the exhaust ports on the AFRs.
I sold the SLP's and bought Dyno Don's 1 3/4 headers with an almost complete y pipe.
I have a deep moroso pan that will let me use a "stock" style y pipe.
Here are some pic's comparing the two.
I had bought a set of 1 3/4 SLP headers a long time ago to put on my 406. I also ended up buying a set of AFR eliminator 195 heads a few months ago. I found the ports on the SLP's were smaller than the exhaust ports on the AFRs.
I sold the SLP's and bought Dyno Don's 1 3/4 headers with an almost complete y pipe.
I have a deep moroso pan that will let me use a "stock" style y pipe.
Here are some pic's comparing the two.
#2
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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:
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:
#3
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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
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
#4
Supreme Member
iTrader: (3)
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.
Trending Topics
#8
Supreme Member
iTrader: (7)
Join Date: Jul 2000
Location: Prince George, BC, Canada
Posts: 2,047
Likes: 0
Received 2 Likes
on
2 Posts
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 **** 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?
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?
#9
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,677
Likes: 0
Received 112 Likes
on
67 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Dyno Don headers and 4in Mufflex
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.
#10
Supreme Member
iTrader: (26)
Join Date: Nov 2002
Location: Moneta, VA
Posts: 2,108
Likes: 0
Received 7 Likes
on
5 Posts
Car: 89 formula 350
Engine: ls1 magnuson tvs2300 supercharger
Transmission: T56
Axle/Gears: 4.11 Dana 44!
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?
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?
#11
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,677
Likes: 0
Received 112 Likes
on
67 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
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 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?
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?
Here are some pictures:
#12
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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.
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.
#14
Junior Member
Join Date: Jan 2007
Location: Lynchburg,VA
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 Pontiac GTA
Transmission: Haven't decided yet ;)
Axle/Gears: 3.42
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.
#19
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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
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.
https://www.thirdgen.org/forums/fire...r-finally.html
#20
Supreme Member
iTrader: (7)
Join Date: Jul 2000
Location: Prince George, BC, Canada
Posts: 2,047
Likes: 0
Received 2 Likes
on
2 Posts
Car: 89 GTA
Engine: 5.7L Supercharged
Transmission: T-56
Axle/Gears: Moser 9" 3.70
Re: Dyno Don headers and 4in Mufflex
LilJayV10 you get any rattles from your 4" mufflex? I might pick up one for myself.
Last edited by Tony89GTA; 05-03-2010 at 07:38 PM.
#22
Supreme Member
Thread Starter
iTrader: (5)
Join Date: Jan 2001
Location: Evansville,IN,USA
Posts: 2,025
Likes: 0
Received 1 Like
on
1 Post
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.
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.
#25
Supreme Member
iTrader: (13)
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...
The following users liked this post:
OG IROC (12-03-2022)
#26
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,677
Likes: 0
Received 112 Likes
on
67 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Dyno Don headers and 4in Mufflex
We needed a better header with 2 1/2" outlets.
So they wouldn't hit the steering, among other things.
#29
Senior Member
iTrader: (8)
Join Date: Aug 2007
Location: Southern Wisconsin
Posts: 1,341
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: Dyno Don headers and 4in Mufflex
for my setup would a 3.5 inch mufflex be to small or should I go with a 4 inch. My problem is that I love the dual setup out back. My other problem is with the sfc and the exhaust. There is no clearance above the subframe connectors. I don't know what to do. Any advice would be great
. Right now I have a 3 inch edelbrock catback with dyno dons 1 3/4 with the 2.5 y pipe, and I don't want to go with LT,
. Right now I have a 3 inch edelbrock catback with dyno dons 1 3/4 with the 2.5 y pipe, and I don't want to go with LT,
Thread
Thread Starter
Forum
Replies
Last Post
Terrell351
Engine/Drivetrain/Suspension Parts for Sale
5
06-13-2021 01:13 PM
LT1Formula
Engine/Drivetrain/Suspension Parts for Sale
20
11-14-2015 12:02 AM