Audi S4 / S5 / RS5 (B9)
Audi B9 S4 & S5 Suspension Guide: Springs to Coilovers
Springs, coilovers, sway bars, bushings or camber arms? How B9 S4/S5 suspension works, what each upgrade changes, and what to buy first.
Audi RS3 (8V/8Y)
Audi RS3 Upgrade Guide: 2.5 TFSI 8V & 8Y Parts
Intake, intercooler, downpipe, exhaust or suspension? What each upgrade does on an 8V or 8Y Audi RS3 with the 2.5 TFSI, and the order we'd do them in.
BMW M340i (G20/G21) · BMW M440i (G22/G23/G26) · BMW M240i (G42)
B58 Bolt-Ons: M340i, M440i, M240i, Z4 M40i & 540i
Intake, charge pipe, intercooler, downpipe, fuel and tune: the B58 bolt-on upgrades in the right order for the M340i, M440i, M240i, Z4 M40i and 540i.
BMW M2 (G87)
BMW G87 M2 Upgrade Guide: Intake, Cooling & Suspension
What to upgrade first on a G87 M2: intakes, cooling, springs, coilovers, sway bars, braces and Vorsteiner carbon, plus where the exhaust fits.
BMW 135i / 335i / 535i (N54) (E82/E90/E60)
BMW N54 Parts: 135i, 335i & 1M Reliability, Then Power
Fix the N54's weak points first, then add power: charge pipe, diverter valves, inlets, intercooler, fuel, cooling and clutch for the 135i, 335i, 535i and 1M.
BMW M3 (F80) · BMW M4 (F82/F83) · BMW M2 / M2 Competition (F87)
S55 Upgrade Guide: F80 M3, F82 M4 & F87 M2 Competition
Charge pipes, crank hub, cooling, downpipes, intakes, tune and suspension: how to upgrade an S55 F80 M3, F82 M4 or F87 M2 Competition in the right order.
BMW M3 (G80/G81) · BMW M4 (G82/G83) · BMW M2 (G87)
S58 Exhaust Guide: G80 M3, G82 M4 & G87 M2
Cat-back, mid-pipe or downpipes? How the S58 exhaust is laid out, what each upgrade changes on a G80 M3, G82 M4 or G87 M2, and what to buy first.
Volkswagen Golf R / GTI (MK7) · Audi S3 (8V/8Y)
EA888 Gen3 Intake & Turbo Inlet Guide: Golf R & S3 8V
Intake, turbo inlet pipe or inlet hose? How the EA888 Gen3 intake works on a MK7 Golf R and Audi S3 8V, what each part does, and what to buy first.
Porsche 911 (991)
Porsche 991 Exhaust Guide: Carrera, Turbo & GT3
SOUL, Capristo, QuickSilver or Akrapovič? How the 991 911 exhaust works on the Carrera, Turbo and GT3, PSE vs non-PSE, and what to buy first.
Toyota GR Supra 3.0 (A90/A91)
Toyota GR Supra A90 Upgrade Guide: Stage 1 to Big Turbo
How to build a GR Supra A90 3.0 in the right order: charge pipe, intake, downpipe and tune, then fuel, cooling, a bigger turbo and drivetrain parts.
Volkswagen Golf R / GTI (MK7) · Volkswagen Golf R / GTI (MK8)
Golf R Suspension Guide: MK7 & MK8 Springs, Sway Bars
Sway bars, subframe inserts, springs or coilovers? What changes the MK7 and MK8 Golf R most, which parts fit both, and what we'd buy first.
Volkswagen Golf R / GTI (MK7) · Volkswagen Golf R / GTI (MK8)
MK7 Golf R Exhaust Guide: Cat-Back, Downpipe & Resonator
Cat-back, resonator delete or turbo-back? How the MK7 and MK7.5 Golf R exhaust is laid out, what each upgrade changes, and what to buy first.
Guides
Buying guides
What to buy for your car, in what order, from the shop that installs it.