C6 High Flow Intake Coupler
Thread Starter
Advanced
Joined: Apr 2020
Posts: 67
Likes: 3
From: San Diego, CA
C6 High Flow Intake Coupler
Can anyone tell me where I can find a Silicone Intake Coupler for less than $30 that replaces the stock accordion style coupler? I find it hard to justify spending $40 - $50 for a 4" silicone reducer hose that has questionable performance benefits. Has anyone noticed an increase in hp with one installed?
Last edited by Cashmando; Dec 28, 2020 at 11:22 AM.
Pro
Joined: Jul 2020
Posts: 509
Likes: 180
I'm willing to bet you the cost of a coupler that you couldn't even detect a difference on a dyno by doing that coupler, and the discrepancies between runs are going to be greater than the difference of the coupler itself. Consider it just for looks.
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,151
From: SW Florida
2021 C6 of the Year Finalist - Modified
I don't think your going to find any additional HP in some smooth ridge-free aftermarket silicone intake coupler.
The OEM style rubber accordion air coupler even flows enough air for my supercharged LS3 ... Bottom line: Big waste of $$
The OEM style rubber accordion air coupler even flows enough air for my supercharged LS3 ... Bottom line: Big waste of $$
Melting Slicks
Joined: May 2018
Posts: 2,091
Likes: 600
From: Question Government
I actually ordered online a smooth intake coupler, and later returned it. It was really difficult to make it fit / slip on and seemed to want to slip off even with the clamps tightened. Because of the smooth coupler's rigid tighter fit, it appeared to make it more time consuming every time I'd want to inspect or change the stock air filter. I ended up keeping and cleaning my stock accordion style coupler; used some Mother's VLR on the interior and exterior to preserve the rubber.
Melting Slicks
Joined: Oct 2015
Posts: 3,299
Likes: 769
From: Mead Wash
2020 C6 of the Year Finalist - Modified
C6 of Year Finalist (appearance mods) 2019
Coupler
I actually ordered online a smooth intake coupler, and later returned it. It was really difficult to make it fit / slip on and seemed to want to slip off even with the clamps tightened. Because of the smooth coupler's rigid tighter fit, it appeared to make it more time consuming every time I'd want to inspect or change the stock air filter. I ended up keeping and cleaning my stock accordion style coupler; used some Mother's VLR on the interior and exterior to preserve the rubber.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Advanced
Joined: Apr 2020
Posts: 67
Likes: 3
From: San Diego, CA
I actually ordered online a smooth intake coupler, and later returned it. It was really difficult to make it fit / slip on and seemed to want to slip off even with the clamps tightened. Because of the smooth coupler's rigid tighter fit, it appeared to make it more time consuming every time I'd want to inspect or change the stock air filter. I ended up keeping and cleaning my stock accordion style coupler; used some Mother's VLR on the interior and exterior to preserve the rubber.
Intermediate
Joined: Jul 2019
Posts: 46
Likes: 12
I put a smooth coupler in my Miata because the accordion style coupler was hitting the hood. The new, smooth coupler clears the hood much better. The downside is that it's too stiff to change the air filter without pulling the bumper cover off the car. If the accordion style coupler fits under your hood, I'd keep it. I doubt there's any performance benefit.