The engine gained 27 whp and 15 wtq at its peak, producing a maximum reading of 284 whp and 254 wtq. Those are some very impressive peak gains, but what really impressed us the most were the consistent gains across the entire rev range. The SG longtubes made substantial power everywhere in the rpm band, averaging 15 to 20 ft-lbs of torque throughout with maximum gains of 30 whp at 6300 rpm and 22 wtq at 6000 rpm.
As impressive as these overall gains are, what really blew our minds was the sound blasting out of the exhaust pipes. The correct merging of exhaust gas pulses into a cat-less single exit exhaust resulted in an engine note that's almost F1 race car in pitch. At 7000 rpm the engine sounds like it's ripping at 10,000 rpm. It's just insane. To hear it for yourself, check out SG-Motorsport's video on YouTube (search "Sequence Garage" or go to
youtube.com/watch?v=4Ap9jzeHMCY).
It's important to keep in mind that running SG's longtube headers without installing a catalytic converter in the mid-pipe means your car won't pass a smog test. But anyone with a VQ-powered race car needs to seriously consider investing in a set of these uncompromising race-tuned headers.
Test Mule
'06 Nissan 350Z Roadster
Engine
3.5-liter RevUp VQ35DE V-6
Relevant Mods
Custom 3" single-exit exhaust, custom 3" cold-air intake, UpRev Osiris ECU flash
The production SG longtube headers use standard two-bolt flanges so you can bolt up your O
Key Features
Replaces the factory headers and catalytic converters
True race merge collectors for maximum torque throughout the powerband
Stainless steel tubing, flanges and collectors to ensure a rust-free life
Stepped primary tubes for improved low-end torque without sacrificing top-end power
Tuned primary lengths for improved high-rpm performance
Individual primary tubes with slip fit merge collectors cut install time by 75 percent
TIG-welded and backpurged for maximum weld strength and beauty
Bolt up to the standard Y-pipe or dual exhaust
With SG-motorsport LONGTUBE headers
gains made
+ 27 hp
+ 15 torque
Before 257.6 whp and 238.6 ft-lbs
After 284.3 whp and 254.2 ft-lbs