JPM Header.

[UltraOrange67-2443]

Anyone know what size tubes are used on the stage 2 and 3?

Wondering which one will be best on my motor.

Cheers, Nick

[hotstreetvw]

Stage 3 is 1-3/4, 2, 2-1/8

[neil68]

Stage 2:

1.625"
1.75"
2.0"

CSP Website states:

Wasp Stage 2 (220 - 290 HP) – 2000-2200 CC Engines
Wasp Stage 3 (from 270 HP onwards) – 2200 CC-Up Engines

[UltraOrange67-2443]

Cool thanks.

I'm building a 2919cc motor.

I've been looking at having a custom header made in 2" pipework.

Cheers, Nick

[hotstreetvw]

I think 2" might be small but it will depend on the heads and intended use.  I would go to burns website, fill out the engine specs, it's a bunch of pages long, and have Vince spec out your system.  Buy your collector from them and get to building.

[UltraOrange67-2443]

I think 2" might be small but it will depend on the heads and intended use.  I would go to burns website, fill out the engine specs, it's a bunch of pages long, and have Vince spec out your system.  Buy your collector from them and get to building.

Its a street motor.

90 x 101.6, JPM MS250 Heads with 48 x 38 valves, 48mm IDA Throttle bodies and just over 17mm of valve lift.

Not a high rpm motor.

Cheers, Nick

[UltraOrange67-2443]

Can anyone with a stage 2 or 3 measure the length of each dia for me.

Cheers, Nick