Phillip V is a Z Car Garage customer and former 350z/current 370z owner. We installed an Injen exhaust system on his 350z and he absolutely loved it so naturally he wanted one for his 370z. We didn’t sell these exhaust systems for the Z34 and this was our very first install. Here is a before/after:

 

More exhaust details:

Rear end view of the exhaust tips:

 

On the intake side we added JWT dual Pop chargers:

 

Dyno Tuning

 

To maximize gains from the bolt-ons we UPREV tuned the Z.  We started with 284hp/235tq and the JWT POP chargers made a significant increase up to 294hp/241tq:

 

The Injen exhaust was good for ~4hp/3tq for a total of 298hp/244tq:

 

UPREV tuning yielded even more power for a final output of 311hp/258tq to the wheels, gains of 27hp/23tq to the wheels:

 

Enjoy The Ride Phillip!

 

Kevin L wanted to improve the performance of his 2007 Infiniti M35.  Thankfully this large, 3rd-generation sedan sports Nissan’s venerable VQ engine so many bolt-ons are available. We started with Motordyne plenum spacer/lower intake and Injen intake:

 

UPREV tuning maximizes the improved breathing for peak gains of 15hp/6tq for a total of 238hp/230tq to the wheels:

 

The M is no lightweight, and driving a little more “spiritedly” can over-tax the factory brakes easily. Kevin opted for the Concept Z Performance Akebono Big Brake Kit (BBK). This kit uses the OEM brake components found on the G37 Sport Coupes and is a direct bolt-on for the M.

  

OEM vs the larger rotors 14″ (F) and 13.8″(R) will definitely help shed heat and prevent fade. Front calipers installed and framed nicely behind wheels:

 

Rear OEM vs BBK:

 

More power and better braking make Kevin’s M sport sedan exciting to drive!

We have done a couple of these modifications before to other HR equipped 350Zs with great results.  This round of upgrades differs in two areas.  First off, this is the first set of headers that we have done on an HR car, and secondly, this car is an automatic.

The other changes we made to the car were the tried and true Injen intake system and a pair of Stillen high-flow catalytic converters, both of which we have installed on numerous cars that have come through the shop.  Both of these parts have made nice gains in the past so we pretty much knew what to expect here.

Looking at the dyno graph you can see that the automatic transmission is certainly using up a little more power than in the manual cars but the power gains are more than noticeable.  The car is now more powerful throughout the entire rev range and the torque curve in the middle is now gonna give that push in the back that we all love when you stab the throttle.

I have a feeling that we will be seeing this car again for another round of modifications.  Now that we are an Up-Rev software retailer maybe we will get the chance to play with the fuel and timing tables to get the car where it needs to be.  We can’t wait to get the chance.