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When I first had the idea to do true dual on my car most people said it couldn't be done with a tunnel mount torque arm. I was able to do less than perfect 2.5" duals with my last short torque arm, but not 3". I switched to a Midwest Chassis short torque arm with their true dual cross member. Here is the 3" dual exhaust I just had made for my car by RPM -Redline Performance Manufacturing here locally. The mufflers are Magnaflow 4x9 #11219 3" center in and out. Everything fits together perfectly, sounds great, nice deep rumble, not very loud at idle or cruising, really comes alive at WOT. The exhaust tucks up nice and tight has good ground clearance.
The midwest chassis tunnel mount and BMR new tunnel mount can run true duals. But there isn't an off the shelf system like ours that can be run with it. I will be testng the new BMR piece on my own Trans Am to see if it will clear our true dual system. The set up looks good man! They did a good job.
Lonnie
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You can run a true dual setup with a tunnel mount tq arm setup if you run a tq arm crossmember with the drop down for exhaust, and put the x-pipe in the drop down, then run both pipes on the passenger side of the driveshaft. I've seen it done several times that way. Its the same design that Kooks uses on their true dual setup except you don't have to run it all the way over the axle. I am thinking of tryin it out soon on my car with an xpipe and dual sweet thunders. I bought two 18" ST bullets with the 2 3/4" cores and am gonna try it with my Spohn Tunnel mount tq arm.
If you are custom building a true dual setup you can get it to work with most tunnel mounted torque arms as you can put the x-pipe right where the crossmember is for optimal clearance. The problem with tunnel mounted torque arms like the Spohn and UMI is that none of the off the shelf true dual setups will work with them and they have clearance issues due to the crossmember running under the exhaust. We fixed this issue with our tunnel mounted torque arm as we run the crossmember above the exhaust so you don't have those exhaust clearance and ground clearance issues.
The midwest chassis tunnel mount and BMR new tunnel mount can run true duals. But there isn't an off the shelf system like ours that can be run with it. I will be testng the new BMR piece on my own Trans Am to see if it will clear our true dual system. The set up looks good man! They did a good job.
Lonnie
Lonnie,
I will give you a call later on so we can get one of our new BMR tunnel mounted torque arms on your car.
I know what the concept of a X junction is for. And ran a that kind of set up with a Spohn body mount Tq arm before. I was just H/C and going for a max setup. Your set up looks great. But for mine going to just dual I saw no improvement at the track.
the over x member will not clear all dual setups. With my bassani system the bmr would have still hit the x. Its really best to measure or try a test fit. The bmr is a nice piece especially with the bigger bushing in front. I had to go with an MWC double drop to clear it on mine though
I would believe if you made a slightly modified version of your Rumbler X True dual setup that resembles the pic I put up in post #4 that would work for typical tunnel mount setups, I'd think it would sell pretty well. Not sure how cost effective vs profit having 2 versions would be though.
Also interested in the TSP/BMR set up. Vendors give me a discount and I will purchase these today and will have them on as soon as I get them. Hehe.
Already have the car in the air.
My TSP true dual exhaust DID fit with the true dual short tq arm from MWC. Had no clearance issues whatso ever. Car was also lowered and still had good clearance
The midwest chassis tunnel mount and BMR new tunnel mount can run true duals. But there isn't an off the shelf system like ours that can be run with it. I will be testng the new BMR piece on my own Trans Am to see if it will clear our true dual system. The set up looks good man! They did a good job.
Lonnie
I'm not sure what you mean by this, your off the shelf duals fit my short torque arm set up from Midwest chassis just fine. Your first statement and the bolded statement are confusing. I have no clearance issues with your duals and the Mwc crossmember. My duals have great clearance with the ground as well
I'm not sure what you mean by this, your off the shelf duals fit my short torque arm set up from Midwest chassis just fine. Your first statement and the bolded statement are confusing. I have no clearance issues with your duals and the Mwc crossmember. My duals have great clearance with the ground as well
Older thread but I wanted to input.
Thank you for the update. There are now two systems that currently fit our TSP true duals, BMR makes one as well as Midwest Chassis. I put the BMR torque arm on mine and we determined it needed spacers for the cross member which are now included in their kit. It works amazing! I absolutely love it!! All of the perks of a short torque arm but without the harsh ride of spherical rod ends for a street driven car.
Lonnie
__________________
NOW OFFERING TSP BY YANK CONVERTERS
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
NEW NUMBER (512)863-0900
Last edited by Sales3@Texas-Speed; Oct 24, 2016 at 01:22 PM.
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True dual and a tunnel mount torque arm 
