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GTM 2>1 left side exhaust

GTM®

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GT di Razza Pura
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Jul 1, 2009
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Malibu
For those who have been en/inquiring... Our 2>1 big block round or square head Tonti left side underbody or left side exit exhaust system for sidecar owners. Below is our prototype and dyno charts for this design. Stock 2-2 vs GT 2>1.

Purchase info;

6E4CB7D7 CEB7 45E7 858D B6079E04AF7F BFC2524F 0B1B 45B7 9093 26490F874ABC 83DAA1FF A9AD 4344 8A43 48B155DD3048
A8645263 2485 4F6C B05C 9305684BFC67
 
Wow. That is a great result Todd. Wish you had developed this before I bought the Zard system.
Irony in that I hadn't planned on building one, but had it on my V7-11 at the SD Rally. Once I posted it on social media, everyone started asking, so I built three. I have one left.

 
Irony in that I hadn't planned on building one, but had it on my V7-11 at the SD Rally. Once I posted it on social media, everyone started asking, so I built three. I have one left.

Been looking for a 2-1 system for my round-head hot rod. Would like to keep my center stand though. How much does something like this run?
 
Been looking for a 2-1 system for my round-head hot rod. Would like to keep my center stand though. How much does something like this run?
 
I have this system on my T4. It's great. Easy fit good sound, super lightweight and power seems good, what more to ask for ?
 
That is one of the most drool-inducing dyno runs I've seen. Conventional wisdom, certainly at least for twins, is that a radically shorter 2-1 system would probably give top end gains, but suffer in the mid-low rpm range, no? But, damn, from 3K right on up it's all gravy right there. I'm amazed the stock system has such a deep mid-range trough.
 
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