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Starting to look at a BBK again and I know the Reyland kit is the popular option but I've also been looking at the godspeed kits and the k-sport option. I'm sure someone had a spreadsheet of how different kits affected the brake bias but I can't find that anymore!

Options I'm looking at:

http://www.reyland.co.uk/subaru-impreza - the standard kit with reyland discs

https://www.godspeedbrakes.co.uk/311-big-brake-kits- - either of the kits - although the 6 pot may be overkill?

http://www.tuningdevelopments.co.uk/product_info.php?cPath=502_625_628&products_id=1387

What are people's opinions on the k-sport or either of the godspeed kits? Would be looking for advice mainly on how they change brake bias and pad choice availability.

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Also interested in response. Discs and pads may need to be replaced soon anyway so contemplating upgrades.

Also interested in approx fitting costs.

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It's hard to know how to respond to this one too. All the kits look good value. I've got the 330mm Reyland 4 pot AP kit. It's fantastic. I did not go with K Sport as they are a lesser known brand and I was concerned that replacement pads choices may be more limited. But really I wouldn't touch K Sport because they are not well known compared to the likes of AP and Brembo. From what I understand if you put a set of 4 pot Brembos for an Impreza it messes up the brake bias. The Reyland kit doesn't have this issue. 

Just to add I've had the Reyland non-floating discs on for a year and a half and 20K miles. No problem at all whatever the use. I think my pads and discs will likely last another 20K miles, which makes it good value. 

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I think it's a case of you get what you pay for. From what I remember the Godspeed discs have straight vanes as opposed to curved and the calipers themselves are smaller and cheaper. I don't imagine you compromise on quality maybe just outright performance, I'm tempted to go for the 4 pot kit as it will do everything I'd need, I suppose it depends on your requirement. 

The brake snobs of world would steer towards Brembo or AP because well, they're Brembo and AP... but I can't say I've heard any horror stories on K sport. They have been knocking around for quite a while, some say they're pants other say their good and others say the are copies of Tarox but I've never seen any evidence behind any claim, standard internet talk.

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In the ford scene (where I came from) ksport are fitted to loads of cars with no problems but they will squeak with light use. My car had ap 6 pots on the front that had been on there for 9 years + and had been badly painted (prior to me getting the car) but we're faultless. The Muppet who painted them painted everything in situ including pads, pins, bolts etc.

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I'm looking into getting a hi-spec front setup and have spoken to them about having a custom rear setup to match which they can do. Only in Dartford too. One thing to keep in mind is pad availability unless you always by 2 sets so you have a spare

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As Jeff said, Will did indeed do his research which was of great benefit to me when I was looking to upgdrade my brakes. 

 

Maybe have a read of this, plenty of info:

 

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I had KSports for 1.5yrs now. More than 10 track days and finishing 2nd set of yellowstuff pads later still like them.

If I were to choose now, I would either go with them again or go for Reyland AP kit with their own disks.

Reyland's kit included Ferrodo DS 2500 pads, so like-for-like (with Reyland rather than AP disks) they are not that much more expensive 1e3cd360abcbaba44bb1ddf3f91696bf.jpg907b85a180de82bfac85a6bcb1db714b.jpg

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I don’t post on here much but I can certainly speak to the quality of AP 6pots, I run a gt86 racecar and have completed >15 Trackdays now and still on my original Ferodo DS3000 pads and I assure you I am not easy on brakes. The 6 pots are expensive but the braking power is immense, the bias with 4pots on the rear is perfect and I rarely trigger the abs unless I get on them terribly late. 

9F63F1A6-D6F8-499D-99DE-BAB43C087EB3.jpeg

BD9B5DBB-2D60-4256-A95E-434F808252D1.jpeg

AE8774B6-80F6-4FDD-8ED1-EA9426A7B139.jpeg

D327D928-FAD7-495E-91FB-250E62F1C14C.jpeg

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I don’t post on here much but I can certainly speak to the quality of AP 6pots, I run a gt86 racecar and have completed >15 Trackdays now and still on my original Ferodo DS3000 pads and I assure you I am not easy on brakes. The 6 pots are expensive but the braking power is immense, the bias with 4pots on the rear is perfect and I rarely trigger the abs unless I get on them terribly late. 
9F63F1A6-D6F8-499D-99DE-BAB43C087EB3.jpeg.3270336d58d5ce0605b1a0f03bcfb5df.jpeg
BD9B5DBB-2D60-4256-A95E-434F808252D1.jpeg.293a65a1b059cbb9fc669748922e8156.jpeg
AE8774B6-80F6-4FDD-8ED1-EA9426A7B139.thumb.jpeg.a89e7d277cfa7c84e121552eab6eb311.jpeg
D327D928-FAD7-495E-91FB-250E62F1C14C.thumb.jpeg.d5cec2c5e59543e18d556897314dbb30.jpeg
what size discs out of interest?

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@Lauren brand doesn't really bother me, as long as they're decent. Pad choice with the k-sport is a valid point that I've not checked but it's one of the more expensive options as with DS2500 pads it's not much cheaper than the reyland kit. Although, if I was to go with the reyland kit I'd be tempted with the AP discs to get the curved vanes. Out of interest, how quickly did your reyland kit ship?

@Varelco I'd expect the godspeed discs to be straight vaned just like the reyland ones which isn't a deal breaker if it's saving me £500! It all depends on the brake bias of the brembo kit really. The AP calipers will be fine.

@VAD17 so, nothing wrong with the k-sport but with the same pads the price difference doesn't justify getting a cheaper brand?

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@Mike 

Here some of my observations of the various kits - bare in mind I thought about this for 18 months before committing to the Reyland kit.

I actually ordered but then cancelled both the Essex AP Racing Sprint kit and the Godspeed AP kit, before settling on the Reyland kit, this was after speaking with @Ade and one of the technical team at AP Racing.

These are for the approx 330mm kits (355mm+ kits have different requirements) 

Reyland - AP Kit:

Pro's:

  • AP Caliper - CP9200 (2 piece aluminum body) 
  • 4 Pistons
  • Dust Boots - Made by Brembo 
  • Perfect for Street and track
  • Common Pad Size
  • 330mm x 28mm discs - 2 piece
  • Good thermal capacity
  • High quality caliper by premium brake manufacturer. 
  • Keeps stock brake bias
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • Various disc options - Either bolted or floating brake disc hat/bell. AP or Reyland disc's. 
  • Clear's the majority of 17" wheels
  • Latest design of caliper by AP Racing - including new paint finish
  • Used by various members of the community - with extensive track use

Con's:

  • Reasonably expensive
  • Custom made brackets, which you need to shim to get perfect fitment
  • Won't fit under stock wheels without spacer.

 

Godspeed - Brembo's:

Pro's: 

  • Brembo caliper
  • 4 piston
  • Dust boots
  • 330 x 28 discs
  • 2 piece discs
  • Cheap

Con's: 

  • Unknown caliper model
  • Unknown caliper material
  • Unknown piston sizes - not sure what effect this will have on brake bias
  • Unknown pad size
  • No brake lines included

 

Godspeed - AP Kit:

Pro's:

  • AP Caliper - CP9040 (2 piece aluminum body) 
  • Dust Boots - Made by Brembo 
  • Common Pad Size
  • Good thermal capacity
  • High quality caliper by premium brake manufacturer. 
  • Latest design of caliper by AP Racing - including new paint finish

Con's

  • Reasonably expensive
  • Caliper designed for a 362mm disc - not 330mm as included
  • Caliper designed for a 32mm thick disc - not 30mm as included
  • Ø330mm disc in this caliper will leave a fairly large gap between the discs OD and the calipers disc pathway and this gap can be prone to collecting road debris.
  • 6 pistons - overkill 
  • No brake lines included

 

K-Sport: 

Pro's:

  • Cheap
  • Used by various members of the community - with extensive track use
  • Clear's the majority of 17" wheels
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • 330mm x 32mm? disc - 2 piece
  • Dust boots
  • Perfect for Street and track

Con's

  • 8 pistons
  • Unknown piston sizes - not sure what effect this will have on brake bias
  • Unknown pad size
  • Unknown replacement disc price
  • Won't fit under stock wheels without spacer.

 

STi Brembo's - Used on Subaru Impreza WRX STi:

Pro's:

  • Cheap
  • Used by various members of the community - with extensive track use
  • Clear's the majority of 17" wheels
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • 326mm x 30mm disc
  • Various disc options
  • Common pad size
  • Dust boots
  • 4 pistons

Con's

  • Shifts brake bias forward massively
  • Steel calipers - heavy
  • Bleed nipples need swapping - i.e. caliper refurb before fitment
  • Not a complete kit
  • Won't fit under stock wheels without spacer.
  • Only available second hand

 

RR Racing (Wilwood😞

Pro's:

  • Cheap
  • Wilwood caliper
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • 326mm x 30mm disc - STi disc's so cheap replacements
  • Clear's the majority of 17" wheels

Con's

  • 6 pistons 
  • no dust boots
  • Won't fit under stock wheels without spacer.
  • Limited pad selection
  • Only available from the US
  • Moves brake bias forward

 

Essex Parts - AP Racing Sprint Kit:

Pro's:

  • AP Caliper - CP8350 
  • 4 Pistons
  • Perfect for Track Use
  • Common Pad Size
  • 2 piece discs
  • Extremely light
  • High quality caliper by premium brake manufacturer. 
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • Clear's the majority of 17" wheels
  • Keeps stock brake bias
  • Used by various members of the community - with extensive track use

Con's:

  • Expensive
  • 299x32mm disc's - Can have some thermal issues
  • Only available from the US
  • Won't fit under stock wheels without spacer.
  • No dust boots
  • Not a daily driver friendly caliper

 

AP Racing Genuine kit:

Pro's:

  • AP Caliper - CP6600 (2 piece aluminum body) 
  • 4 Pistons
  • Dust Boots
  • Perfect for Street and track
  • Keeps stock brake bias
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • Clear's the majority of 17" wheels - including stock wheels

Con's:

  • Very Expensive
  • 26mm thick discs
  • Limited pad options
  • Limited disc options
  • Uses older AP caliper

 

Stoptech ST40:

Pro's:

  • Stoptech ST40 caliper
  • 4 Pistons
  • Clear's the majority of 17" wheels
  • Complete kit - Calipers, Pads, Brake lines, brackets, discs
  • 328mm x 28mm disc - 2 piece
  • Dust boots
  • Perfect for Street and track

Con's

  • Expensive
  • Can't 100% confirm piston sizes
  • Limited pad replacement options
  • Unknown replacement disc cost
  • Won't fit under stock wheels without spacer.

 

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@will300 perfect post, thank you! Looks like the godspeed kits are out - the AP kit I did think would be overkill and couldn't find anyone else selling the caliper used as a 330mm kit. Too many unknowns with the brembo kit to fork out £1k for! Think it might well be the reyland kit and let Gary worry about the shims :D  I assume 949racing 6uls (17x8 +40?) you ran had plenty of clearance? 

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Just ordered my Reyland kit in red. Most likely I will get Gary to fit it while the car is with RRG for the recall in May. 

Thanks to @will300 for the comprehensive pros and cons list. That the was the final push to say the Reyland kit is the right one for me. 

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Btw - for those interested in KSport caliper and pad sizes.

KSport 8-pot caliper for 356mm disks I believe is the same size as AP 6-pot CP5555 (but pls correct me if I am wrong here).

Brake pads are CP3894D54 for AP calipers (easier to find this way).

ECB Yellowstuffs are under £200 (both fronts and stock rears), Bluestuff is just over £200 (incl delivery). e5b4dfcc807b80eb3f4f186496466418.jpg

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