2019+ G20/G28 BMW 3 Series (320i/330i/M340i B48/B58) Valved Cat-Back Exhaust - Stainless | G20 Catback & Valved Exhaust

$609–$699

💡 Supplier-direct price above. See how supplier prices compare to US retail →

Minimum order: 1 set
Sold: 6 sold
Supplier: Jiangxi Boska Trading Co., Ltd. (profile in Who Makes What — evidence: FactoryPlug product database — cataloged from this supplier's Alibaba listings (2026-09-18, 2026-09-19, 2026-09-22).)
Compatibility: Listed by supplier for: G20, G28 — year, model, trim, engine and VIN still needed before ordering.
Shipping: Quoted by the supplier — ask about DDP vs DAP and delivery time in writing before paying
Added: 2026-09-18

✓ Enter your vehicle — check fitment before you order

This listing mentions: G20 · G28 — confirm against your exact build.

As an affiliate, we may earn a commission when you buy through links on this site, at no extra cost to you. Full disclosure

Want a better price? Ask the supplier whether a better price is available and mention @royblinge90 sent you.

Got questions? DM me on Instagram @royblinge90 — I answer fast, and I'll make sure you get the right part.

! Fitment check: Fitment is never guaranteed from a listing page. Always confirm fitment, year, model, trim, engine, and VIN directly with the supplier contact before you buy.

✓ Real listing photos — never placeholders✓ Profile on file — supplier rating and transaction history checked✓ No checkout here — you buy direct from the supplier

Who manufactures this

The part matters — but so does the factory behind it. Here's exactly who manufactures this component.

Jiangxi Boska Trading Co., Ltd.

★★★★★★★★★★ 4.8 378 ratings

Verification

Supplier rating 4.8/5 on Alibaba

Recorded sales

6 sold

Directory evidence

FactoryPlug product database — cataloged from this supplier's Alibaba listings (2026-09-18, 2026-09-19, 2026-09-22).

✓ Why it made the catalog: this listing cleared our quality bar with a 4.8/5 supplier rating from 378 supplier ratings, 6 recorded sales, a profile in our Who Makes What directory (evidence: FactoryPlug product database — cataloged from this supplier's Alibaba listings (2026-09-18, 2026-09-19, 2026-09-22).).

Full supplier profile →

Supply-chain audit

FactoryPlug is a supply-chain intelligence directory, not a store. We hold no inventory and process no checkouts — this record exists so you can see the real terms before you contact the supplier yourself.

Minimum order quantity: 1 set
Material spec: Contact supplier
Shipping terms: Contact supplier — ask about DDP vs DAP before you commit
Seller type: Jiangxi Boska Trading Co., Ltd. — Unconfirmed (factory vs trading status unverified; directory evidence: FactoryPlug product database — cataloged from this supplier's Alibaba listings (2026-09-18, 2026-09-19, 2026-09-22).)
Transaction history: 6 sold

Also known as

Call it what you want — it's the same part. Younger builders call these G20 catback, valved catback and M340i exhaust. Old-school guys call them valvetronic cat-back exhaust system and valved performance exhaust.

Buying guides worth reading

Downpipe Buying Guide — Catted vs catless, sizing, CEL
Factory vs Reseller Pricing — Where the price gaps come from
Verify Suppliers — Vet the seller before you pay
Supplier Chat Scripts — Copy-paste fitment requests for the supplier
All Alibaba buying guides →

About this part

Chassis codes: G20, G28
Minimum order: 1 set
Supplier rating: 4.8/5
Recorded transactions: 6

Stainless-system alternative to the existing titanium G20/M340i valved cat-back at a lower price band — non-duplicate. Listing covers both B48 and B58 — buyer confirms engine with seller. Product link verified live on 2026-09-18. Search it your way — Younger builders call these G20 catback, valved catback and M340i exhaust. Old-school guys call them valvetronic cat-back exhaust system and valved performance exhaust.

Supplier rating and transaction history checked before listing
Price shown is the supplier range — final price depends on options and shipping
Questions about fitment? Confirm year, model, trim and VIN directly with the supplier contact