CB 12mm 292deg cams - 4/5. Great torque and good power and generally pretty tractable. Good trackday not a race cam.
45 DCOE Dell'Ortos - 5/5. These have been great. Only really needed above about 165bhp though
Skimmed head, high compression pistons - 5/5. Easy and delivers more power
Lightened flywheel (Alfaholics unit) - 5/5. Again, another essential for a quick engine but do it well or buy a good one.
Well-built engine - ported/balanced - 4/5. My Jamie Porter built unit has been generally great and robust - not quite the power promised
Swivelling trumpets - 3/5. Look and sound great but expensive and not optimal for top-end power.
Tubular 4-2-1 stainless exhaust (Alfaholics) - 5/5. Can't say how much power this delivers but robust and easy to fit
Bosch 4 electrode plugs - 5/5. Available from Halfords and very reliable - engine likes them more than NGK.
Omex rev limiter/shift light - 5/5. Wish I'd fitted this before I blew the engine - essential to my mind. Love the shift light too.
Red Top Electric fuel pump - 3/5. Had one fail and not convinced it's essential for the power I have.
Mocal oil cooler - 5/5. Essential for track use to keep that oil temperature under control
Standard 5-speed gearbox - 5/5. Perfect for fast road use. Short-5th is only necessary for track use,
4.7:1 Race "Gripper"LSD - 6/5. Possibly the best modification. An LSD is utterly essential for a track car and the gripper is very robust. The shorter ratio really gives the car "bite".
Alfaholics aluminium donut conversion - 5/5. This is worthwhile if only because it makes getting the engine/gearbox in and out so much easier. Donut replacement? Forget it.
Alfaholics front race spring conversion - 5/5. Easy to fit and adjust and much reduced unsprung mass.
S4 front anti-roll bar and rose-jointed drop-links - 5/5. Again, very easy to fit and to dial-out any residual tension.
Alfaholics "Low" rear springs - 4/5. Worthwhile but should have been even lower - I've trimmed mine and I know I'm not the only one...
Rear anti-roll bar removed - 5/5. Free conversion and makes the rear of the car much more friendly.
Bilstein Sports shocks - 4/5. Great fast road/trackday set-up - very expensive adjustable dampers would be better for racing.
7x14 GTA Replica alloy wheels - 4/5. Very good looking and very well made. 15" would be much better as 14" tyres are getting hard to find.
Adjustable top arms - 4/5. Not cheap but ideal for setting up though there are cheaper ways of achieving the same result.
Alfaholics 4-pot alloy front calipers - 4/5. Uprated brakes are great and I like these a lot. My only frustration is the limited pads I can use with them (No Ferodo DS3000 for instance)
Race master cylinder - 5/5. Does away with those very poor replica units on sale these days and adjustable in bore for cheap replacement
No servo - 4/5. A bit hard-core for many. I like it but it has been a bit of a compromise that some might not put up with. Easily reversible though.
Braided brake flexi lines - 5/5. Just do it.
Ferodo DS2500 pads - 5/5 Great trackday and fast-road pads.
Tilton brake balance valve - 4/5. A manual balance valve is essential for track use. A lever-type unit may have been better than the knob-type that I fitted.
Yokohama Advans 048R 195/60 R14 tyres - 4/5. Only available in "Medium" compound in this size but then pretty much the only tyre of it's sort in this size
Glass fibre doors - 4/5. Fantastic weight-saving but with the obvious reduction in driver protection - only used with full cage with door bars.
GRP boot & bonnet - 5/5. Excellent weight-saving with no downside.
Lexan side and rear windows - 4/5. Again, excellent weight-saving though flexibility can be an issue. Rear screen can pop out so ensure it's well secured
Glass fibre GTA "Autodelta" dash - 2/5. Difficult to fit, expensive and of minimal weight-saving. Might save chopping up a rare dash.
Fabricage roll cage - 3/5. Was good value and customised for my car. Door bars could/should be higher and a belt bar would have been useful. Like the Alfohics one more.
Sparco Evo II race seat - 3/5. Comfortable fit for my hips and shoulders. Bit of a squeeze into the car and not especially well made.
Shroth harnesses - 5/5. Excellent quality, easy to adjust shoulder straps, great buckle.
Red Top 25 race battery - 4/5. Saves lots of weight and lots of cranking capacity. Had a few fail internally but might not have been a faulty battery.
Aluminium foam-filled fuel tank - 3/5. Having no level sender is a bit of an issue. The idea is great though as is the positioning.
Plumbed-in 4 litre extinguisher - 5/5. Essential for competition use. Relatively easy to fit.
Sparco race steering wheel - 3/5. Great concept. Would be better without the silly push-buttons which break off from time-to-time