Turbo Services

(parts not included)

Ported Exhaust Housings

Removing material at the exhaust housing outlet is one step in freeing up available horsepower for your GN. 

Porting the exhaust housing allows faster spoolup & increases flow.

Opening up the wastegate hole eliminates boost creep. Standard puck size is 1 1/8". By noting the carbon track around the hole, it can be safely enlarged to 15/16". I do the turbo porting freehand with a die grinder and carbide rotary files. 

Ported Elbows

Opening up the elbow to allow exhaust gases an easier path of exit is another way to maximize available horsepower for your GN.

Elbow on left shown with the lip removed. Stock elbow on right

Shown in this pic is how I round over the edge at the elbows exit. This allows the exhaust to have a straighter path into the downpipe. My opinion is that merely enlarging the outlet to remove the lip is only half the work needed to maximize the turbo elbows flow. 

Seen any Grand Nationals in the 13s & high 12s that have a $460 3" downpipe? I have. Yes, going fast on the factory parts is possible. My GN has gone 113.46 on a stock turbo, ported elbow & stock downpipe and there's no reason yours couldn't pick up several MPH with some basic low-cost mods. 

What you learn when you optimize the parts already on the car will pay you back down the road in knowing how to select your future mods. 

3" downpipes pipes aren't needed until you reach the 115+ mph level. 

If interested in having your turbos exhaust housing ported, it isn't necessary to remove it from the turbo. I can do the porting without damaging the turbine wheel and the center section & compressor housing will be covered to protect them.

SORRY - Oversized Wastegate Pucks No Longer in Stock

Try Keith Mease or Jason Cramer if you need an oversize puck

Attn: ATR Downpipe Owners !!

Have a sticking wastegate Puck?  I can repair it

Email for info 

Pricing

~  Port Exhaust Housing - $45 ~

~ Enlarge Wastegate hole - $25 ~

~ Port Turbo Elbow $75 shpd ~

Ported Elbows Outright (when available) $125 shpd

$50 core charge refunded when you return your stock elbow

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Email: stevemonroe@cox.net