ALL AUTOCARS

TRIAL's main goals for this muffler were power and sound. The results moved them to nick name the muffler “Lotus Sound”, because you wouldn’t guess that it was a Toyota under the hood.

Toyota's 2ZZ engine crankshaft pulley is finalized.
Crank pulley is small, lightweight and can reduce the moment of inertia in response to the engine, improving the accelerator response and the high turnover of power to UP.

News of the TRIAL ZZT231 Stroker kit, known as the 3ZZ kit has rocked the Celica world.

TRIAL 3ZZ Naked Engine for MR2 Spider, Celica GT, and GTS. This is a naked engine. Just swap with the engine you have now (some modifications necessary). If you have a Celica GTS, you can use the stock fuel infectors. Otherwise you will need to go with an aftermarket application.

The complete engine includes a 2ZZ engine base with the 3ZZ kit already installed (see kit contents below). Most wiring, piping, tubing or connectors are generally not included.

For a base, a new or used 2zz engine must be provided or paid for by the customer. Original mounts are slightly modified and used. Apex-i power FC or HKS F-Con V-Pro can be used for maximum performance. The car will run normally without any fuel modifications until you start to put on the gas. Other fuel controllers such as Apex-i S-AFC might work but Power FC and VPro are recommended for best results. After the kit you get about 220 hp and 20 kg of torque. on Japanese high octane gas (105). The Engine will hold up to 8,000 RPM. The valves are thought to be the weak point of this engine. The stock valves are generally ok up to 7,000 rpm, but if you plan on going over that, a valve kit is recommended. The valves used on the Trial S. Stock valve springs are fine. Compression for the kit is raised to 13:7.1 but it can be left at just a little over stock or even lowered.. The higher compression increases power but would cause problems with lower octane gas. You may also special order low compression pistons. Note: Quality of gasoline varies from country to country. The above stats were acquired with Japanese 105 octane gas.


The 3zz internals kit includes:
Engine Crank, Connecting Rods, Pistons,
Crank End Spacer Ring, Crank End Oil Seal,
Front Spacer Washer, Metal Head Gasket.

• Official Trial site (Japanese)

This header is designed for the Japanese domestic market and may not work with cars outside of Japan.
This part is intended for off road and race track applications only. Use of this part on public roads of many countries is illegal.
This part should only be installed by an experienced professional. Amateur installation may result in damage to the header and your car! Trial and Trial USA are in no way responsible for damage or injury that may occur.

Header Installation. (Most work can be done from under car)
1) Remove engine mud shields, front and rear engine mount bolts and center support beam.
2) Remove front pipe and muffler if necessary.
3) Remove heat shields and muffler mid section. Save stock gaskets and screws.
4) Remove top and bottom heat shields of stock header.
5) Remove L brace that is connected to lower part of header..
6) Remove manifold bolts and nuts (7 total).
7) Remove stock manifold, without removing stock gasket between block and header. Take off stock flange gasket and put it on Trial Header.
8) Carefully insert Trial header. Tilting engine makes this task easier (two people).
9) Loosely apply bolts and nuts from inside to out of header and block.
10) Re-Install L brace to block and hand tighten to header after drilling a larger hole in brace where you see the previous bolt's mark ( about 4 mm to the outside).
11) Tighten down all bolts and nuts inside to out.
12) Attach stock upper manifold heat shield. Lower shield will not fit.
13) Re-install stock engine mounts.
14) Re-install down pipe and center pipe, reusing all stock screws and gaskets. Tighten spring bolts all the way.
15) Re-install stock heat shields to center piece.
16) Re-install Engine mud shields.





Make sure to use stock gasket.


















Make sure to use factory bolts








Source: Trial Japan

This new Exhaust Manifold was built for TRIAL'S Celica Track Car. It will work on the 2ZZ and 3ZZ.
The manifold turned out gains of 10hp on a stock Celica GTS with no mods to the computer!
It was tested on a US spec car and similar gains were archived.

Celica GT 1ZZ header is available

Installation Instructions click here


Celica+N1Muffler:Power


Celica+N1Muffler:Stats


Celica+n1+header:Power


Celica+n1+header:Stats

Version 2 includes a redesigned side step and front bumper. Large Carbon Canards are an option for the Version 2 Front Bumper.