Derek's B5 A4 4.2L V8 Swap
I purchased this car off our co-worker, Evan, after pestering him 5 times for it, with the full intent of doing a 4.2L belt driven V8 swap out of a 2000 S8. Since purchasing, the swap is complete along with replacement of the entire B5 S4 front & rear subframes and suspension. I rounded out the build with an 18Z BBK in the front and B5/B7 S4 BBK in the rear. To keep that V8 cool I took a MK4 Radiator and flipped it with some persuasion with a tig welder along with an E-Fan conversion.
Up next PAINT...
SWAP IT!!
B5 A4 4.2L V8 Swap Build List
Audi B5/B6/B7 A4/S4 Street Shield Skid Plate Kit
Protect vital drivetrain and chassis components from costly damage with this durable 7GA aluminum skid plate!
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Brand:
ES#:
4840231
Mfg#:
030456LA01KT
B5 S4 Valved or Non-Valved Cat Back Exhaust
Experience your driving passion with our ECS Exhaust System!
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Fits both Sedan and Avant
Fits both Sedan and Avant
Brand:
ES#:
4698873
Mfg#:
041750LA
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Availability:
In Stock
In Stock
MK4 Performance Aluminum Radiator - With Installation Kit
Direct-fit upgrade! Featuring a 26% increase in cooling system capacity along with a durable, all aluminum construction. Includes new radiator mounts, fan switch seal and coolant.
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DO NOT Purchase for your B5 A4 - This is custom for this particular engine swap and not bolt on
DO NOT Purchase for your B5 A4 - This is custom for this particular engine swap and not bolt on
Brand:
ES#:
4005135
Mfg#:
018163ECS02KT
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Availability:
Ships in 10 Business Days
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Ships in 10 Business Days
MK4 High Flow Cooling Fan Conversion Kit
Replace your unreliable OEM fans with our plug and play solution featuring an aluminum fan shroud and Spal fans
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DO NOT Purchase for your B5 A4 - This is custom for this particular engine swap and not bolt on
DO NOT Purchase for your B5 A4 - This is custom for this particular engine swap and not bolt on
Brand:
ES#:
4423287
Mfg#:
013969LA
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Availability:
Ships on Oct 13, 2026
Ships on Oct 13, 2026
18" Style 628 Wheels - Set Of Four
18"x8" ET35 5x112 - Gunmetal/Machined Face
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Brand:
ES#:
2143408
Mfg#:
628-1
ECS "Stage 4" Front Big Brake Kit - B5/B6/B7/C5
Enhance braking performance with this plug-and-play upgrade! Featuring massive 6-piston calipers, lightweight 2-piece brake rotors, and all components needed for installation.
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Brand:
ES#:
1896
Mfg#:
B5S4S4BBKRXS
Rear V5 Plain Brake Rotors - Set (300x22)
Precision manufactured and featuring a GeoSpec® corrosion-resistant coating
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Brand:
ES#:
4668233
Mfg#:
8E0615601R-P
Rear Big Brake Upgrade (300x22)
Upgrade to 300mm rear brake rotors from the B6/B7 S4 models.
Does not include rotors - To be used with 300x22 rear rotors from the B6/B7 S4 models
Brand:
ES#:
2973093
Mfg#:
034-306-0001
5 Speed Street Short Shifter - Black Shift Knob
Ditch the sluggish stock shifter and elevate your driving experience
Fits all shift knobs with 12mm x 1.5.
Brand:
ES#:
4810682
Mfg#:
A4-B5/6/7-S-SSK5
Billet Aluminum Rear Subframe Reinforcement Kit
Prevent rear subframe failure
Brand:
ES#:
2893741
Mfg#:
034-402-7002
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Availability:
Ships on Aug 4, 2026
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Ships on Aug 4, 2026
Street Density Line Transmission Mount - Priced Each
Increase performance and durability without sacrificing comfort
Brand:
ES#:
2951985
Mfg#:
034-509-4046SD
Density Line Motor Mount Kit - Street Density
Void-free and fluid-free, eliminating the slop associated with the factory mounts
Brand:
ES#:
2893870
Mfg#:
034-509-0007KT
Solid Rear Sway Bar - 25.4mm
Substantially reduce understeer and body roll
Brand:
ES#:
2864584
Mfg#:
034-402-1001
ST XA Performance Coilover System - Adjustable Damping
Developed alongside KW Automotive, the ST XA allows individual adjustment of the damping to suit just about all your driving needs!
Height adjustable from 1.6" to 2.8" Front & Rear
Brand:
ES#:
4056710
Mfg#:
18210032
Complete High Durability Front Control Arm Kit
Includes all front control arms, HD tie rod ends, HD sway bar end links & hardware
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We Price Match - Give Us A Call or Chat!
For vehicles with a VIN up to 3-072000, Split is in model year 2003
We Price Match - Give Us A Call or Chat!
For vehicles with a VIN up to 3-072000, Split is in model year 2003
Brand:
ES#:
3005
Mfg#:
8D0498998S1
Front Lower Polyurethane Control Arm Bushing Kit - Set
Engage the road with precision, confidence and reliability with our ECS Poly Control Arm Bushings!
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Brand:
ES#:
3411541
Mfg#:
019210ECS01-03KT
Performance Rear Control Arm Bushing Kit - Race
Improve handling and control - Upgrade to a more engaging driving experience
Brand:
ES#:
2763560
Mfg#:
PFR3-209BX4KT
Front Upper Control Arm Bushing Set - Inner - Race
Improves handling and control - Upgrade to a more engaging driving experience
Brand:
ES#:
2651410
Mfg#:
PFF3-203BX4