Pump gas tuning. Made 640whp @ 17psi

SP Built 4.1L Stroker
SP 6262 Billet Twin Turbo Kit
SP Fuel System
SP400 Transmission
ProEFI Standalone ECU

Gains:
Boost — 450rpm spool increase
Horsepower — 100whp increase @ 3900rpm
Torque — 120wtq increase @ 3900rpm

Notes:
300WTQ @ 3200rpm!!!
300WHP @ 3800rpm!!!
Peak Torque increase of 30lb/ft!!!

150whp increase @ 3300rpm!!!

Precision GT4294 Journal bearing turbo
SP Long Tube Race Header
SP 4″ Downpipe/midpipe
SP 5″ Intake
SP400 Transmision
SP Built shortblock
ProEFI 128 Standalone ECU
Top Secret Titanium Exhaust
SP Boost Activated Exhaust Cutout
SP Quick Spool Valve

55whp increase at the same boost level!!!

547whp @ 17psi

The SP Quick Spool valve and our SP Boost Acticated cutouts have been becoming VERY popular and are proving to be well worth the investment. We are now looking for Distributors as well as Retailers  who are interested in carrying our valves and cutouts.

If interested please inquire with us.

Our boost activated exhaust cutout allows you to just drive and not worry about flipping switches, etc.. It uses an actuator to open the valve on its own (fully open at 11psi) so on full throttle it opens the second it hits desired boost. You can run it off of the actual actuator (11psi) or you can keep it closed by wiring up a solenoid to tell it at what boost level to open.

It’s full stainless steel construction is virtually indestructable and will not bend/break from usage. There are no electric motors to fail, and it opens extremely fast vs the alternative products on the market.

Available in 2.5″, 3″, and 4″ Sizes.

I have been getting many calls… and I mean MANY calls about or boost actuated cutouts that we made. The biggest question is “When are they going to be ready to ship?” The answer to that is SOON!!! I am hoping by next week I should have some 3 and 4 inch units in stock. Soon after that I will have the 2.5 inch versions ready for sale to the public.

I am trying my best to get these out for you guys… but I (we) do not want to release a product until its been fully tested. Pricing for the cut outs will go as follows:

SP Boost Activated Exhaust Valve (includes: valve, actuator & actuator mount)
2.5″ $349
3″ $349
4″ 399

Additional items
Y-pipe (Stainless)
2.5″ $48
3″ $48
4″ $77

Y-pipe (Aluminized)
2.5″ $42
3″ $45
4″ $65

We are also going to offer a 3bolt flange style with an angle cut piece of stainless so you could just cut an opening on the exhaust and weld up the piece we provide (option to adding that “y” section).

We also have hobb’s switches and solenoids to use in conjunction if you want to set the boost level of where it opens. otherwise it will be about a 7-8psi fully open setting, or we can get different actuators for you to open at higher boost levels.

I will be glad to answer any of your questions that you may have. You can call the shop or email me at tim@spracingonline.com

Thanks!!!

Tim@SP

We’re happy to announce the release of our newest 350z/G35 product. This is a MUST part if you do any drag racing in your 350z. There is only 1 main bolt holding the diff to the backside of the subframe. With the addition of our bracket you increase the support when launching the car.

We did all of the testing on our shop 350z and with numerous 9 second passes and sub 1.5 60ft launches it’s help insure our differential stays in place.