3" Down Pipes?

[~JM~]

Who makes a 3" DP (internal waste-gate) that provides clearance between top of pipe & the bottom of the A/C heater box?

[Steve Wood]

I suspect this is the best made one   https://rjcracing.com/product/downpipes/  also the most expensive

Here is one from GN1 sold by Full throttle Speed   http://www.fullthrottlespeed.com/gn1-performance-stainless-3-downpipe-with-internal-wastegate.html

You can search for an used one on FB or turbobuick.com as well

[~JM~]

I'm familiar with RJC quality. I have a call in to them.

The DP I just installed has very little clearance between top of pipe & bottom of A/C box.

Thanks

[Steve Wood]

Be sure your driver's side engine mount is not collapsed

[~JM~]

Be sure your driver's side engine mount is not collapsed

Just installed HR engine mounts.

Body mounts are still original, but don't look overly compressed.

Looks like the bend towards the horizontal plane takes place too early in the pipe run.

[Steve Wood]

using both of the HR mounts tends to lift the engine a bit on both sides and this will put the pipe closer to the pinch weld.  If you have a 1/4" of room or even 3/16's it should never touch assuming the front of the test pipe or cat is attached well.  The engine just does not move much even if the transmission  mount is not so good.

On the other hand, some of these DP's are made somewhat inconsistently and you probably have touched upon the problem

[~JM~]

Installed HR mounts in "low" position, new trans mount, rebuilt cat hanger (previous member of TB forum rebuilt), Pypes 2.5" dual exhaust with 3" test pipe.

Plenty of clearance near body pinch weld & everywhere else. A piece of notebook paper slides between top of pipe & the bottom of A/C box heat shield.

Believe the DP is from TA Performance but not 100% certain.

[Steve Wood]

I read the comments on the TA Performance site and it appears their headers are tailored for their headers.  The comments say they will work with the factory headers IF the heat shield is removed or modified so it would appear what you are seeing is normal for their headers.

I have the old TH downpipes on both cars.  They go under the box and are probably a 1/4" from the bottom of the box at their closest point.  Until you mentioned it, I had never specifically looked at it for clearance.
 

[kjhansen]

I ordered a 3" downpipe from RJC about 8 weeks ago.  It's still not made, much less delivered.

[~JM~]

I ordered a 3" downpipe from RJC about 8 weeks ago.  It's still not made, much less delivered.

Heard from Jason today. He has a back-log that he is shipping out this week & next.

In my limited experience it is unusual for him to be behind.

[phil_long]

It's very rare that RJC is behind. I guess that means business is good?