MagnaFlow Exhaust, Mufflers & Cat Converters - Quality

MagnaFlow 2 X 3in. 4 Into 1 Performance Exhaust Header Merge Collector 10803

MagnaFlow 2 X 3in. 4 Into 1 Performance Exhaust Header Merge Collector 10803 - Main image
$343.5 $458 In stock

Category: Performance Exhaust

Merge Header collectors can help maximize your custom header design and deliver big power through better exhaust scavenging. MagnaFlow Performance Exhaust Header Collector 10803 is made of durable stainless steel and built using CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime warranty.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Ava ★★★★★

The welds are clean and the stainless steel feels heavy-duty, which gives me confidence it'll hold up under heat. Bolted right up to my existing header tubes with no alignment issues. Definitely noticed a smoother pull through the mid-range on my first test drive.

Daniel ★★★★★

The collector’s internal merge spike is clearly machined, not just cast, so flow should be smooth. Fits my headers perfectly and the welding is clean, no slag inside.

Eva ★★★★★

The merge collector’s 4-into-1 design makes a noticeable difference in scavenging—my custom header build pulls harder up top without any fuss. The stainless construction feels solid and should last through plenty of heat cycles.