Aftermarket headers and NO FLEX PIPE

[2001 GTS]

I'm about to put on some B&B headers on and noticed the deletion of the flex pipe.

When the motor torques...where is the flex now? Do the headers take the brunt of the motor movement?

 

[GTSPOWERED]

When I installed my Belenger headers I bought a 3" flex pipe from Summit and installed it.

 

[GTSjbud]

I am also going to install a new exhaust/muffler setup and had the exact same question.

So I assume that from GTSPOWERED's reply that it is recommended? Please confirm.

Cheers
GTSjbud

 

[GTSnake]

Your motor shouldn't move that much unless you have a worn motor mount.

 

[Steve 00RT/10]

Belanger headers for the last 6 years / almost 60,000 miles. No flex pipe--no problems at all.

Steve

 

[2001 GTS]

Ok...sounds good. I just replaced my motor mounts last summer, so I should be good.

Thanks

 

[plumcrazy]

note to self...change motor mounts

 

[jgfurr]

Assuming the GenII hangers are the same as GenI, just don't bolt up the hangers near the front of the side sills. I originally did bolt those up, that didn't leave enough flex in the system, and I ripped the hangers off the exhaust pipe (leaving a nice hole in the exhaust pipe too).

 

[GTSjbud]

note to self...change motor mounts

Is this simply good maintenace for your car? Are they worn out? What make/model of motor mount are you going to install?

Cheers
GTSjbud

 

[plumcrazy]

gonna do homework on what one to use. but im installing a S/C and headers with no flex pipe, so id rather be safe.

 

[99 R/T 10]

Your motor shouldn't move that much unless you have a worn motor mount.

Exactly, and the flex pipe flows terribly. You'll lose HP by using a flex pipe.

 

[2001 GTS]

How much of an issue are the front exhaust mounts?

Anyone else break the hangers off?

 

[GTSjbud]

Yes, one of the brackets broke through the stainless steel exhaust pipe right at the weld joint.

I assume that there was to much torque and twisted the hanger which in turn broke through the pipe.

 

[Steve 00RT/10]

Yes, one of the brackets broke through the stainless steel exhaust pipe right at the weld joint.

I assume that there was to much torque and twisted the hanger which in turn broke through the pipe.

Could it be that the SS just got brittle and broke? There is some iron content in most SS exhaust systems. Throw in that SS doesn't dissipate heat well and you get a weak link.

Steve

 

[2001 GTS]

What are B&B headers made of?

 

[Joseph Dell]

never used the flex-pipe w/ my set-up. of course, i also switched to solid motor mounts recently. but before plum had my set-up, no flex pipes and no issues.

JD

 

[plumcrazy]

ok, good news there

 

[GTS Bruce]

No flex pipe and front hangers not used.no problem gTS Bruce

 

[Madduc]

I just sent my B&B's to get coated and noticed that there are no hangers on the "turn-out" section. Thouhgt that maybe they forgot to weld them on, but know maybe they don't for just this reason.

 

[Mr Hemi Head]

Using the front hanger without a flex pipe would be a problem because of the close proximity to the engine.

The next hanger is located near the front of the rear wheels.

Belangers do not use the front OEM hanger and there seems to be enough flex in the system making a flex pipe unnecessary.

 

[Simms]

I just sent my B&B's to get coated and noticed that there are no hangers on the "turn-out" section. Thouhgt that maybe they forgot to weld them on, but know maybe they don't for just this reason.

I have the same setup, no problems at all.

 

[ViperTony]

I had Borla headers which came without a flex turnout pipe but the turnout pipe supplied did have the J hooks for the front hangers. My headers consistently loosened and I had exhaust leaks by the header flanges. Additionally, one of my front hanger mounts ripped/cracked from the vibration due to the lack of flex. I ended up cutting off the j hooks and all was well. This was recommended by Dan at DC performance.

I now have a full Belanger system which does not have a flex turnout pipe and does not mount to the front hangers. All is well. According to Lou Belanger, there's enough flex in his system which makes the flex pipe unecessary.