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***THESE ARE BUILT TO ORDER with an average 5weeks build time after receiving a paid order, all orders are non refundable once paid***


$9995+GST and Freight We are proud to release the new BA/BF BIG TURBO BOSS 5.4L kits along side our original boss turbo kits.

These kits are aimed at big power built motor combos looking to push higher boost. ​Rated at 600+rwkw and 30+psi.


All inclusive like our entry level kits, you will only need a fuel system/tune and exhaust to match. High quality hand fabricated from heavy duty steampipe manifolding all tig welded and stainless tig welded intercooler/dump piping.

Our test car a BA XR8 on e85 made 615rwkw@6500rpm on 25psi through a slippery converter/btr auto on our mainline roller dyno with a basic engine combo of a stock Boss 260 with scat rods and crow valve springs.

The kit requires NO chopping/bashing of the cars inner guards or battery tray and is as bolt on as can be, however the lower LH headlight needs to be trimmed slightly on the rear to allow fitment.


Due to fraudulent false chargebacks costing us thousands we have been forced to remove credit card/PayPal from our payment options. EFT bank transfers only. We appreciate you understanding.


Freight includes full insurance and tracking


Turbocharger is a ball bearing G42 1450hp rated unit and we use a plazmaman 1000+hp rated intercooler
. Recommended exhaust twin 3” or single 4”.


BOV recommended over 20psi boost. All components backed by a 12months warranty.



1x Turbo manifold, heavy duty steampipe construction

1x Crossover pipe in steampipe, gasket and bolts

1x Turbo manifold mid pipe in steampipe

1x Front turbo flanged pipe and bolts

1x RH lower intercooler pipe in stainless

1x LH lower intercooler pipe in stainless

1x RH upper intercooler pipe in stainless

1x LH upper intercooler pipe in stainless

1x 3.25-3" straight silicone hose

2x 2.5" 45 silicone hoses

1x 2.5" 90 silicone hose

3x 3-2.5" reducing silicone hoses

1x 2.5" stainless joiner

9x HS40 clamps

9x HS52 clamps

1x HS56 clamp 2m Vac hose

1x Z663 engine oil filter

1x Turbo to dump pipe vband clamp

1x Turbo to front pipe vband clamp

1x Dump to catback lap clamp

3x 2" vband clamps

1m 30mm heat sleeve std

1m 30mm heat sleeve hook and loop

1m 20mm heat sleeve std

1x Heatshielding material sheet flat

1x T4 titanium turbo beanie

7.5m Titanium heatwrap

1x Dipstick tube

1x Dipstick

1x Oil feed gasket

1x Oil drain gasket

1x Oil feed kit (1/4-1/4m, 1/4 tee, 1/4-1/8r, braided oil line, oil flange and bolts)

1x Turbosmart 50mm wastegate 14psi

1x Pulsar G42 1450hp turbo as standard or Garrett G42 1450hp turbo by option (add $2950+gst)

1x Stainless dump pipe 3.5”

1x Oil drain kit (stainless drain flange, drain hose, hose clamps and sump drain fitting)

1x Plazmaman 1000+hp intercooler (raw finish)

1x intercooler mounting brackets

1x 5” Turbogaurd

2x 8mm short bolts

1x Coolant fitting straight 6an pushlock

1x Coolant fitting 90d 6an pushlock

2m 400 series pushlock -6 hose

1m Hosegaurd 19mm

1x Plastic pice for headlight trimming

1x Sticker

1x Basic fitting guide

BOSS 5.4 BIG turbo kits

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