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BMR crossmember ?

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Old 07-06-2015, 05:44 PM
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BMR crossmember ?

I ordered a BMR TH350 crossmember.

Can I route 3" exhaust under it, or does it hang down too low?

Couldn't find any threads on it.

-- Joe
Old 07-07-2015, 03:17 AM
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Re: BMR crossmember ?

Originally Posted by anesthes
I ordered a BMR TH350 crossmember.

Can I route 3" exhaust under it, or does it hang down too low?

Couldn't find any threads on it.

-- Joe
No it'll most likely hang too low especially with 3" pipes. What you want is a double hump crossmember.
Old 07-07-2015, 05:09 AM
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Re: BMR crossmember ?

Originally Posted by thatsupnow
No it'll most likely hang too low especially with 3" pipes. What you want is a double hump crossmember.
Couldn't find such a thing for a TH350.

I have a single 3" off the turbo. If I try to route t in the factory location I need to change the subframe connector. Ugg.

-- Joe
Old 07-07-2015, 04:00 PM
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Re: BMR crossmember ?

Originally Posted by anesthes
Couldn't find such a thing for a TH350.

I have a single 3" off the turbo. If I try to route t in the factory location I need to change the subframe connector. Ugg.

-- Joe

Have you thought about going with oval piping? It costs a pretty penny but it might be what you need, Rather then changing the subframe connector which I'm sure will be a big PITA! Or another way to go would be to just fab one up by cutting up a stock crossmember and weld it up to where you need it.

Last edited by thatsupnow; 07-07-2015 at 04:03 PM.
Old 07-08-2015, 06:03 AM
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: BMR crossmember ?

Originally Posted by thatsupnow
Have you thought about going with oval piping? It costs a pretty penny but it might be what you need, Rather then changing the subframe connector which I'm sure will be a big PITA! Or another way to go would be to just fab one up by cutting up a stock crossmember and weld it up to where you need it.
I think I'm going to try going over the crossmember. Appears to be enough room.

-- Joe
Attached Thumbnails BMR crossmember ?-img_20150707_135905.jpg  
Old 07-08-2015, 11:55 PM
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Re: BMR crossmember ?

I used 3" oval(I think it saves about 1/2" compared to round pipe!) and made a custom crossmember.

I also have a th350
Old 07-09-2015, 06:05 AM
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Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: BMR crossmember ?

Originally Posted by LB9GTA
I used 3" oval(I think it saves about 1/2" compared to round pipe!) and made a custom crossmember.

I also have a th350
This is another example of design failure. Look at my picture.. Why the heck didn't they flip the sides the other way so they straddle the frame, and run the tube higher up?

I'm not going to cut it up and try to fix it, but it's kinda silly how far it hangs down vs stock. Unless the idea was if you hit something the crossmember will take the impact instead of the exhaust.... I dunno.

-- Joe
Old 07-09-2015, 11:43 PM
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Re: BMR crossmember ?

Time to cut it!
You'll be happier later on!
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