I know this question has been asked many times. I have looked for the answers but none of them seem very specific to my question.

My charge piping is 2.5". Throttle body outside diameter is roughly 2-5/8".

I know you can stretch a 2.5" coupler on the throttle body. This is how my car has been for 12 years but it lacks some IME. The coupler always sags to one side and does not provide a very smooth path for the air to travel.

Will going to something like a 4ply HPS 2.5" -> 2.75" reducer coupler reduce this problem and keep the charge pipe centered in the throttle body? I assume since its not strait and has a taper that it will be stiffer. Is this a correct assumption?

If anyone has any feedback on a stronger or better coupler I am all ears.

Again, I am not concerned about the fitment, I am concerned about the ability to keep the charge pipe in line and not offset to the throttle body.

Thanks.

 

1.) Piping wasn't a good fit to begin with/poor installation.
2.) Straight is more rigid.
3.) You aren't using layered couplers to begin with?

Option: Make a bracket to support the piping like most good installs have.

 

1. Been like this for years. Overtime the piping sags. Installation is fine.
2. I wouldn't have guessed that and unless the couplers are cheaper makes no sense.
3. Yea but they are crappy turbonetics couplers because that is what the shop had when I burst a coupler a few months ago... switched them all at that time. Probably a mistake.

Option: Its the charge piping from a Fmax kit that has been installed for 13 years. Got any pics of what a "good install" has in regards to a support bracket?

 

Out of the brands of pipe couplers which one is stiffest/thickest?

 

I use the ones from ATP, and I have never had any problems or complaints with them.

 

Good deal, thanks.

I was planning on ordering from HPS or ATP unless someone had any other suggestions based on personal experience.

These are the ones I am currently using. They are terrible but they hold boost so whatever, they got me through a dyno session. http://www.summitracing.com/parts/TNT-30172-4/?rtype=10