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Heating and Cooling› Radiators

034Motorsport

EA839 All-Aluminum Radiator Upgrade

Name: EA839 All-Aluminum Radiator Upgrade
Brand: 034Motorsport
SKU: 034-102-1005/7

$1,400.00 $776.00 Save $624.00

SKU: 034-102-1005/7

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Non-Returnable Item

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Moderate — 2–4 hours

Overview

The 034Motorsport Radiator Upgrade is a high-capacity, all-aluminum radiator designed for EA839 2.9TT or 3.0T equipped Audis.

Engineered in collaboration with CSF Radiators, this upgrade offers improved coolant capacity and seamless integration with your vehicle's existing cooling system. It features an all-aluminum construction with a thicker performance core and re-engineered billet aluminum end tanks for efficient coolant flow.

Show original supplier description

The 034Motorsport Radiator Upgrade is a high-capacity, all-aluminum radiator engineered for EA839 2.9TT or 3.0T equipped Audi vehicles, designed to address the limitations of the factory cooling system under high-performance driving conditions. Manufactured in collaboration with CSF Radiators, this upgrade replaces the stock unit with a larger, all-aluminum radiator. It features a thicker performance core (42mm vs. OEM 35mm) and re-engineered billet aluminum end tanks with machined inlets and outlets for enhanced coolant flow efficiency. The radiator boasts a 40% increase in coolant capacity, from 2.5L to 3.5L, and a 16% increase in overall cooling capacity. Its design includes 65 individual 2-row B-tube cooling tubes with a 5mm fin height, which are seam-brazed for improved heat transfer and durability compared to traditional welded tubes, ensuring reduced recovery time between aggressive driving cycles. The radiator is 100% TIG welded for maximum strength and longevity. This radiator upgrade is listed as OE Part Interchangeable with 8W0 121 251 H. For further cooling performance improvements on B9/B9.5 Audi S4/S5 models, 034Motorsport also recommends pairing this radiator with their Auxiliary Radiator Upgrade Kit.

Vehicle Symptoms

Engine temperature rising quickly during spirited driving
Coolant overheats on track or in heavy traffic
Frequent coolant top-offs or visible leaks
Performance drops after hard acceleration due to heat soak
Cooling fan runs continuously but still high temps

Relevant Conversations

EA839 engine running hot after tune
034Motorsport radiator vs OEM replacement
Audi B9 S4 overheating on track
Looking for upgrade radiator for 2.9T engine
CSF radiator on EA839 thread
High coolant temp on stage 2 S5
Where to buy 034-102-1005?
034Motorsport EA839 radiator install
Radiator compatibility Audi A6 3.0T
intercooler and radiator upgrade for tuned S4

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	034Motorsport
Part Number	034-102-1005/7
Category	Heating and Cooling

Videos

Upgraded Intercooler and Intake Increase Power at Stage 1 B9/B9.5 S4/S5/SQ5? | 034Motorsport FAQ

Higher Mileage B9 3.0T Maintenance Items? | 034Motorsport FAQ

Should I Divorce the Heat Exchanger on my B8/B8.5 S4? | 034Motorsport FAQ

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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