Stock Exhaust - SUS409 or SUS304?
07-11-2018, 02:28 AM
#1
Thread Starter
Stock Exhaust - SUS409 or SUS304?
Is the OEM exhaust made out of stainless steel grade 304 like aftermarket systems or is it 409 grade (like the HKS Hi Spec L or dual Hi Power systems)? could it be neither of those and be mild steel?
07-11-2018, 04:34 AM
#2
Don't know the grade of the OE system. After 8 years on the car with no corrosion it's some grade of stainless but I assume you're looking for an aftermarket exhaust.
My Tanabe Medalion Touring aftermarket exhaust is 304 stainless. The tubing and other components are thinner (lighter) than the OE system.
(Horsepower Direct dot com) (Emphasis added.)
--Chuck
My Tanabe Medalion Touring aftermarket exhaust is 304 stainless. The tubing and other components are thinner (lighter) than the OE system.
What's Better, T409 or T304 Stainless Steel Exhaust Components? The most frequently used stainless steel in performance exhaust system is T409. Found in Magnaflow exhaust and many stainless mufflers, this mixture has enough chromium and nickel to resist corrosion. But, it lacks the strength to be used for fasteners. Next up in the ring for corrosion resistance and all-around toughness is the T304 steel used in Borla exhaust and Cobb exhaust. This is the highest quality stainless steel used in the automotive world. It is most often found in exhaust tips. Super tough and nearly impervious to rusting, T304 has around 20% chromium and 10% nickel content in the alloy. In fact, the ferrous metal content is so low that magnets won't stick to it, making identifying T409 from T304 very easy.
--Chuck
07-11-2018, 07:20 AM
#4
Had never tried a magnet test....but my guess was 400 series as well.
Maybe the resonator is 300 series and the piping is 400? Honda exhausts are notably better at corrosion resistance than other manufacturers.
Idk...put a magnet on it.
Maybe the resonator is 300 series and the piping is 400? Honda exhausts are notably better at corrosion resistance than other manufacturers.
Idk...put a magnet on it.
07-11-2018, 10:25 PM
#6
Thread Starter
Don't know the grade of the OE system. After 8 years on the car with no corrosion it's some grade of stainless but I assume you're looking for an aftermarket exhaust.
My Tanabe Medalion Touring aftermarket exhaust is 304 stainless. The tubing and other components are thinner (lighter) than the OE system.
(Horsepower Direct dot com) (Emphasis added.)
--Chuck
My Tanabe Medalion Touring aftermarket exhaust is 304 stainless. The tubing and other components are thinner (lighter) than the OE system.
(Horsepower Direct dot com) (Emphasis added.)
--Chuck
07-11-2018, 10:26 PM
#7
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